Potential fix for python-gdal errors on Travis

From: https://github.com/travis-ci/travis-ci/issues/2401
Remove -qq in travis script to diagnose error
Further fix attempt for travis
Update .travis.yml
Update .travis.yml
The previous commit fixed the error, reducing dependencies
Addition of libgdal1h to travis config fixes bug #35
Merge pull request #1 from adamcandy/master

Bring in updates to Travis config