Completely reviewed and refactored tests to support both CKAN 2.2/2.3,
geoalchemy 1/2 and PostGIS 1/2 (TODO test on PostGIS 1.5)
Removed all references to legacy ckan tests, and removed old or
incomplete tests.
Tests are passing, apart from a couple which didn't work before:
* test_functional.py -> functional/test_package.py (3 failures in 4)
* functional/test_dataset_map.py (1 fail in 1)
There may be some code errors still untested.
Renamed Validator -> Validators to make more sense.