print exception when importing pandas.lib
I was trying to install pandas and kept getting the error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/pandas/**init**.py", line 16, in <module>
    raise ImportError('C extensions not built: if you installed already '
ImportError: C extensions not built: if you installed already verify that you are not importing from the source directory

I couldn't figure out what was happening until I made this change and saw from the printed out exception that I  didn't have the dateutils package installed.

Thanks (I moved the print statement til after the exception is grabbed out of the sys module (I can't remember how that ended up like that instead of assigning the exception when it's caught))
