Removed allowed_failures from Travis configuration.
Updated list of skipped tests:
- Removed working ones
- Updated failing reasons
- Add some test in case we are running on Travis
Added Xfail support for PHPT tests and installed missing locales on Travis
Marked locale_sort.phpt as xfail and removed locale installation (it was not working)
Changed xfail implementation
Synced to master
Removed test that was fixed in PR #51
Merge pull request #50 from sk-/testing

Removed allowed_failures from Travis configuration.