Merge branch 'release/0.2.5' into develop
Split tests/test_scene.parser.py into multiple files
Added support for DVD matching and added more video sources and codecs, added audio and scene pattern groups.
Switched tools/run_tests to use the csv module.
Couple of small fixes to CaperResult and CaperConstraint
Added constraint tests and test_print_tree test
Fix to test_invalid_attribute test on Python 3.2 and 3.3
Bumped version to 0.2.6
Merge branch 'release/0.2.6'