TST: windows failures after #7907 (failing 27-32,26-32,26-64)
(ignore the pandas 0.12.0 install, this is on master, its in a separate build dir)

cc @sinhrks
related #7907

```
C:\Users\Jeff Reback\Documents\GitHub\pandas>  more versions.27-32.log

INSTALLED VERSIONS
------------------
commit: None
python: 2.7.5.final.0
python-bits: 32
OS: Windows
OS-release: 7
machine: AMD64
processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None

pandas: 0.12.0
nose: 1.3.0
Cython: 0.19.2
numpy: 1.9.0b1
scipy: None
statsmodels: None
IPython: 1.1.0
sphinx: None
patsy: 0.2.1
scikits.timeseries: 0.91.3
dateutil: 2.2
pytz: 2013.8
bottleneck: 0.7.0
tables: None
numexpr: None
matplotlib: 1.3.1
openpyxl: 1.7.0
xlrd: 0.9.2
xlwt: 0.7.5
xlsxwriter: 0.5.0
lxml: 3.3.5
bs4: 4.3.2
html5lib: 1.0b3
httplib2: None
apiclient: None
rpy2: None
sqlalchemy: 0.9.3
pymysql: 0.6.1.None
psycopg2: 2.5.2 (dt dec pq3 ext)

C:\Users\Jeff Reback\Documents\GitHub\pandas>more test.27-32.log
..SS..SS..SS..SS..SS..SS..SSSSSSSSSS..SS..SS..SSSS...........SS..SS..SS..SS..SS..SS..SS................SSSSSSSSSSSSSSSS..SS...........................
.S...S.S....SSS..............................................S......................................................S.................................
....................S..................................................SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS........................................
......................................................................................................................................................
......................................................................................................................................................
.........S...........................................................................................................................................S
............S.....................................................................................................................SS......SSSSSSSSSSSS
SSSSSSSSSSSSSSSSSSSSSSSSSS.....S........................................................................S.............................SSSSSSSSSSS.....
......................................................................................................................................................
.........................S..........S...................................S..................S..S.SSSSSSS.......................................S.......
...S......S.....SSSSSSSSSSSSSSSSSSSSSSSSSSS...........................................................................................................
.........................................................S............................................................................................
................................................S..S..................................................................................................
............................................................................S...S.....................................................................
......................................................................................................................................................
....................................................................................................................F.................................
......................................................................S...............................................................................
..................................................................................S...................................................................
................FFF...F...................................................................................c:\Users\Jeff Reback\Documents\GitHub\pandas
\build\lib.win32-2.7\pandas\core\algorithms.py:140: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
  sorter = uniques.argsort()
C:\python27-32\lib\site-packages\numpy\core\fromnumeric.py:791: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
  a.sort(axis, kind, order)
................................................................................................................S.....................................
......................................................................................................................C:\python27-32\lib\site-packages
\numpy\core\_methods.py:59: RuntimeWarning: Mean of empty slice.
  warnings.warn("Mean of empty slice.", RuntimeWarning)
....................................................................................................................................S.SSSSS...........
......................................................................................................................................................
........S.........................................S.S.................................................................................................
...................................S...........................................................................................SSS...SSSS.S.S.S.S.S.S.
SSS.SSS.S.S.S.S.S.S.S...S.S.SSSSSSSSS..............S.....S..SS..S......S.......S..............SS.SSSSS.S....S................c:\Users\Jeff Reback\Docu
ments\GitHub\pandas\build\lib.win32-2.7\pandas\tools\plotting.py:3004: UserWarning: To output multiple subplots, the figure containing the passed axes
 is being cleared
  "is being cleared", UserWarning)
......................................................................................................................................................
................................................................................................................c:\Users\Jeff Reback\Documents\GitHub\
pandas\build\lib.win32-2.7\pandas\core\index.py:1200: RuntimeWarning: Cannot compare type 'Timestamp' with type 'str', sort order is undefined for inc
omparable objects
  "incomparable objects" % e, RuntimeWarning)
......................................................c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\core\index.py:1200: Runt
imeWarning: Cannot compare type 'Timestamp' with type 'long', sort order is undefined for incomparable objects
  "incomparable objects" % e, RuntimeWarning)
......................................................................................................................................................
..............................................S.....S................................................................S................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
............................................................................S.........................................................................
...S.S....S........SS.......................................................................................................S.........................
....S...S.............SSS.........S...........SS.............SSS....SSSS..............................................................................
..........................................SS..............................................................................S.......................S...
...........................SS............................................S............................................................................
..........................................................................................S.......
======================================================================
FAIL: test_constructor_datetime64_tzformat (pandas.tseries.tests.test_timeseries.TestDatetimeIndex)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\tseries\tests\test_timeseries.py", line 2182, in test_constructor_date
time64_tzformat
    tm.assert_index_equal(idx, expected)
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\util\testing.py", line 579, in assert_index_equal
    right.dtype))
AssertionError: [index] left [datetime64[ns] <class 'pandas.tseries.index.DatetimeIndex'>
[2013-01-01 00:00:00-05:00, ..., 2016-01-01 00:00:00-05:00]
Length: 4, Freq: AS-JAN, Timezone: tzoffset(None, -18000)], right [<class 'pandas.tseries.index.DatetimeIndex'>
[2013-01-01 00:00:00-05:00, ..., 2016-01-01 00:00:00-05:00]
Length: 4, Freq: AS-JAN, Timezone: pytz.FixedOffset(-300) datetime64[ns]]

======================================================================
FAIL: test_constructor (pandas.tseries.tests.test_tslib.TestTimestamp)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\tseries\tests\test_tslib.py", line 47, in test_constructor
    self.assertEqual(result.value, expected)
AssertionError: 1404205200000000000L != 1404205200000000005L

======================================================================
FAIL: test_constructor_with_stringoffset (pandas.tseries.tests.test_tslib.TestTimestamp)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\tseries\tests\test_tslib.py", line 100, in test_constructor_with_strin
goffset
    self.assertEqual(result.value, expected)
AssertionError: 1404205200000000000L != 1404205200000000005L

======================================================================
FAIL: test_repr (pandas.tseries.tests.test_tslib.TestTimestamp)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\tseries\tests\test_tslib.py", line 166, in test_repr
    self.assertIn(tz_repr, repr(date_tz))
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\util\testing.py", line 143, in assertIn
    assert a in b, "%s: %r is not in %r" % (msg.format(a,b), a, b)
AssertionError: : '/US/Pacific' is not in "Timestamp('2014-03-07 00:00:00-0800', tz='dateutil/America/Los_Angeles')"

======================================================================
FAIL: test_nanosecond_string_parsing (pandas.tseries.tests.test_tslib.TestTimestampNsOperations)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-2.7\pandas\tseries\tests\test_tslib.py", line 461, in test_nanosecond_string_pars
ing
    self.assertEqual(ts.value, expected_value)
AssertionError: 1367392545123456000L != 1367392545123456789L

```
