Moving test out of __init__

[facastagnini]

Fixes #4. Installing Pandas on a raspberry pi is very very slow, we dont need to load Pandas just to use Ballpark

[FMCorz]

+1 for this fix.

[mistahj67]

+1

[rwest202]

bump, any reason this can't go in?

[owlas]

Love this library and had the same issue. I've forked and applied this exact patch. Just replace:

# ballpark
git+git://github.com/owlas/python-ballpark@0.1#egg=ballpark

in your requirements.txt

I'll stick it on pypi later if it's useful to anybody else!