Pandas test fails with Scipy 0.19
#### Code Sample, a copy-pastable example if possible

```python
import pandas as pd
pd.test()
```
#### Problem description

there are some errors w.r.t. interpolation related functions. Seems that this is related to the change of behavior for some Scipy functions in 0.19. But which is correct?

~~~
======================================================================
FAIL: test_interp_various (pandas.tests.frame.test_missing.TestDataFrameInterpolate)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/frame/test_missing.py", line 513, in test_interp_various
    assert_frame_equal(result, expected)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1313, in assert_frame_equal
    obj='DataFrame.iloc[:, {0}]'.format(i))
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: DataFrame.iloc[:, 0] are different

DataFrame.iloc[:, 0] values are different (28.57143 %)
[left]:  [1.0, 2.0, 2.81547781415, 4.0, 5.0, 5.52964175305, 7.0]
[right]: [1.0, 2.0, 2.81621174, 4.0, 5.0, 5.64146581, 7.0]

======================================================================
FAIL: test_interp_scipy_basic (pandas.tests.series.test_missing.TestSeriesInterpolateData)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/series/test_missing.py", line 711, in test_interp_scipy_basic
    assert_series_equal(result, expected)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (33.33333 %)
[left]:  [1.0, 3.0, 6.82352941176, 12.0, 18.0588235294, 25.0]
[right]: [1.0, 3.0, 6.769231, 12.0, 18.230769, 25.0]

======================================================================
FAIL: test_cmov_window_regular (pandas.tests.test_window.TestMoments)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/test_window.py", line 878, in test_cmov_window_regular
    tm.assert_series_equal(xp, rs)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (60.0 %)
[left]:  [nan, nan, 9.28667, 10.34667, 12.00556, 13.33889, 13.38, 12.33667, nan, nan]
[right]: [nan, nan, 9.60058823529, 10.8523529412, 12.86, 13.52, 12.7629411765, 12.2070588235, nan, nan]

======================================================================
FAIL: test_cmov_window_regular_linear_range (pandas.tests.test_window.TestMoments)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/test_window.py", line 895, in test_cmov_window_regular_linear_range
    tm.assert_series_equal(xp, rs)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (60.0 %)
[left]:  [nan, nan, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, nan, nan]
[right]: [nan, nan, 2.35294117647, 3.35294117647, 4.35294117647, 5.35294117647, 6.35294117647, 7.35294117647, nan, nan]

======================================================================
FAIL: test_cmov_window_regular_missing_data (pandas.tests.test_window.TestMoments)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/test_window.py", line 928, in test_cmov_window_regular_missing_data
    tm.assert_series_equal(xp, rs)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (80.0 %)
[left]:  [nan, nan, 9.33167, 9.76125, 9.28667, 10.34667, 12.00556, 13.82125, 14.49429, 13.765]
[right]: [nan, nan, 9.61230769231, 9.24125, 9.60058823529, 10.8523529412, 12.86, 14.3857142857, 14.1308333333, 13.3433333333]

======================================================================
FAIL: test_cmov_window_special (pandas.tests.test_window.TestMoments)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/test_window.py", line 955, in test_cmov_window_special
    tm.assert_series_equal(xp, rs)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (60.0 %)
[left]:  [nan, nan, 9.86851, 11.02969, 11.65161, 12.75129, 12.90702, 12.83757, nan, nan]
[right]: [nan, nan, 9.95592026795, 11.1636020642, 11.8220886145, 12.6904154014, 12.797644924, 12.8491264878, nan, nan]

======================================================================
FAIL: test_cmov_window_special_linear_range (pandas.tests.test_window.TestMoments)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/tests/test_window.py", line 973, in test_cmov_window_special_linear_range
    tm.assert_series_equal(xp, rs)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1181, in assert_series_equal
    obj='{0}'.format(obj))
  File "pandas/src/testing.pyx", line 59, in pandas._testing.assert_almost_equal (pandas/src/testing.c:4156)
  File "pandas/src/testing.pyx", line 173, in pandas._testing.assert_almost_equal (pandas/src/testing.c:3274)
  File "/Users/yimengzh/miniconda2/envs/default35/lib/python3.5/site-packages/pandas/util/testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Series are different

Series values are different (60.0 %)
[left]:  [nan, nan, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, nan, nan]
[right]: [nan, nan, 2.07210900201, 3.07210900201, 4.07210900201, 5.07210900201, 6.07210900201, 7.07210900201, nan, nan]

----------------------------------------------------------------------
Ran 10252 tests in 287.945s

FAILED (SKIP=627, failures=7)
~~~

#### Expected Output

#### Output of ``pd.show_versions()``

<details>
INSTALLED VERSIONS
------------------
commit: None
python: 3.5.2.final.0
python-bits: 64
OS: Darwin
OS-release: 15.6.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8

pandas: 0.19.2
nose: 1.3.7
pip: 8.1.2
setuptools: 26.1.1.post20160901
Cython: None
numpy: 1.11.3
scipy: 0.19.0
statsmodels: None
xarray: None
IPython: 5.1.0
sphinx: None
patsy: None
dateutil: 2.5.3
pytz: 2016.6.1
blosc: None
bottleneck: None
tables: None
numexpr: None
matplotlib: 1.5.2
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: 2.8
boto: None
pandas_datareader: None
</details>
