TestGroupBy failures and docs don't build on Mac OS X Lion
I just installed pandas from git (9d0949396a8533d9fb9b0a6d0fb90a9f0ac16b23) on Mac OS X Lion (XCode 4.3).
I'm using Macports python 2.7, numpy 1.7.0.dev-3503c5f and cython 449e3b58a9fe4826179b7208241ee991e7360a7b

There's one test error and two failures (see details below).
Also I can't generate the docs (see details below).

During the build the clang compiler was used and there were over 100 warnings for tseries.
I think this is unrelated, but I can paste a build log if you are interested.

```

======================================================================
ERROR: test_cython_fail_agg (pandas.tests.test_groupby.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/tests/test_groupby.py", line 1126, in test_cython_fail_agg
    summed = grouped.sum()
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 307, in sum
    return self.aggregate(lambda x: np.sum(x, axis=self.axis))
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 928, in aggregate
    result = self._aggregate_named(func_or_funcs, *args, **kwargs)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 989, in _aggregate_named
    output = func(grp, *args, **kwargs)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 307, in <lambda>
    return self.aggregate(lambda x: np.sum(x, axis=self.axis))
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/numpy/core/fromnumeric.py", line 1489, in sum
    return sum(axis=axis, dtype=dtype, out=out)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/series.py", line 972, in sum
    return nanops.nansum(self.values, skipna=skipna)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/nanops.py", line 43, in f
    result = alt(values, axis=axis, skipna=skipna, **kwds)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/nanops.py", line 67, in _nansum
    the_sum = values.sum(axis)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/numpy/core/_methods.py", line 18, in _sum
    out=out, skipna=skipna, keepdims=keepdims)
TypeError: unsupported operand type(s) for +: 'bool' and 'str'

======================================================================
FAIL: test_series_agg_multi_pure_python (pandas.tests.test_groupby.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/tests/test_groupby.py", line 466, in test_series_agg_multi_pure_python
    result = data.groupby(['A', 'B']).agg(bad)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 245, in agg
    return self.aggregate(func, *args, **kwargs)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 1177, in aggregate
    return self._python_agg_general(arg, *args, **kwargs)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 333, in _python_agg_general
    result, counts = self.grouper.agg_series(obj, agg_func)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 619, in agg_series
    return self._aggregate_series_pure_python(obj, func)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 649, in _aggregate_series_pure_python
    res = func(group)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/core/groupby.py", line 327, in <lambda>
    agg_func = lambda x: func(x, *args, **kwargs)
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/tests/test_groupby.py", line 463, in bad
    assert(len(x.base) == len(x))
AssertionError

======================================================================
FAIL: test_wrap_aggregated_output_multindex (pandas.tests.test_groupby.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/tests/test_groupby.py", line 1024, in test_wrap_aggregated_output_multindex
    self.assertEqual(len(agged2.columns) + 1, len(df.columns))
AssertionError: 9 != 10

----------------------------------------------------------------------
Ran 1544 tests in 291.297s

FAILED (SKIP=7, errors=1, failures=2)
```

```
$ python make.py html
Running Sphinx v1.1.3
Exception occurred while building, starting debugger:
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sphinx/cmdline.py", line 188, in main
    warningiserror, tags)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sphinx/application.py", line 102, in __init__
    confoverrides or {}, self.tags)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sphinx/config.py", line 216, in __init__
    exec code in config
  File "/Users/deil/code/pandas/doc/source/conf.py", line 71, in <module>
    import pandas
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/__init__.py", line 10, in <module>
    import pandas._tseries as lib
  File "numpy.pxd", line 177, in init pandas._tseries (pandas/src/tseries.c:119198)
ValueError: numpy.ndarray has the wrong size, try recompiling
> /Users/deil/code/pandas/doc/numpy.pxd(177)init pandas._tseries (pandas/src/tseries.c:119198)()
(Pdb) 
```

Next I installed statsmodels and tried to build the docs there.
This fails complaining about not finding pandas._tseries ...

```
reading sources... [ 29%] dev/internal                                                                                                                                        
Exception occurred:
  File "/Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/__init__.py", line 10, in <module>
    import pandas._tseries as lib
AttributeError: 'module' object has no attribute '_tseries'
```

... although it is there:

``` bash
-rwxr-xr-x  1 deil  staff   278B Apr 12 22:36 /Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/_tseries.py
-rw-r--r--  1 deil  staff   682B Apr 12 22:36 /Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/_tseries.pyc
-rwxr-xr-x  1 deil  staff   1.4M Apr 12 22:36 /Users/deil/Library/Python/2.7/lib/python/site-packages/pandas-0.7.3-py2.7-macosx-10.7-x86_64.egg/pandas/_tseries.so
```
