setup.py: Import cleanup
Removed outdated .hgtags file
tests: Fixed whitespace issues
tests: Allow tests to be run independently
test_postgis: Fixed missing ST_ prefix

This breaks on PostGIS 2.x

test_postgis: Added more missing ST_ prefixes
test_postgis: Removed debug print statement
Added TravisCI config file
Merge pull request #31 from Turbo87/test

Basic support for TravisCI