Fix failing tests.

Hi Justin!

I figured out how to run the geoscript-py tests (it's really easy, I am just dense) and fixed a few tests.  The GML test is legit, the other two you should look closely at.  The bar.py test was periodically failing because the x1-x0 was returning a negative number.  The spatialite and oracle doc tests were failing because the jars aren't available unless you download them using maven profiles, so I ignored them.  This may not be correct.  Oh, I had to pip install simplejson and py-dom-xpath to get a couple of the tests to pass.  I hope this helps!

Cheers!
Jared