SQL feature provider: Configurable filters
Multi-column backrefs
Log settings module on startup
Added Travis CI configuration
More README about tests
Coverage tests with nosetests
Testing: PostGIS setup/teardown
Rewrite tests as TestCase classes
SQL Tests
Vagrantfile for easier testing

Added a Vagrantfile to use Vagrant for easier setup of testing boxes
with VirtualBox.
Add password to test setup
More tests
Bumped version number for release
Merge branch 'release/0.0.2'