nosetests errors/failures --> install issue?
Pulled in master and installed. Running nosetests gave 47 errors, 5 failures.
Removed build directory, all *.so files and site_packages/pandas dir/files and tried again -- same.

Listing errors (many occured in several tests):

``` python
lib/python2.7/site-packages/pandas-0.8.0.dev_4e4b2f5-py2.7-linux-x86_64.egg/pandas/core/series.py", line 98, in na_op result = lib.scalar_compare(x, y, op)
AttributeError: 'module' object has no attribute 'scalar_compare'

lib/python2.7/site-packages/pandas-0.8.0.dev_4e4b2f5-py2.7-linux-x86_64.egg/pandas/core/index.py", line 283, in format
    values = lib.maybe_convert_objects(values, safe=1)
  File "inference.pyx", line 230, in pandas._tseries.maybe_convert_objects (pandas/src/tseries.c:64416)
TypeError: maybe_convert_objects() got an unexpected keyword argument 'safe'

InvalidOperation: comparison involving NaN

lib/python2.7/site-packages/pandas-0.8.0.dev_4e4b2f5-py2.7-linux-x86_64.egg/pandas/core/series.py", line 98, in na_op
    result = lib.scalar_compare(x, y, op)
AttributeError: 'module' object has no attribute 'scalar_compare'

lib/python2.7/site-packages/pandas-0.8.0.dev_4e4b2f5-py2.7-linux-x86_64.egg/pandas/core/internals.py", line 227, in _pad
    _method = lib.pad_2d_inplace_float64
AttributeError: 'module' object has no attribute 'pad_2d_inplace_float64

lib/python2.7/site-packages/pandas-0.8.0.dev_4e4b2f5-py2.7-linux-x86_64.egg/pandas/core/internals.py", line 237, in _backfill
    _method = lib.backfill_2d_inplace_float64
AttributeError: 'module' object has no attribute 'backfill_2d_inplace_float64'
```
