Set all string to InvariantCulture
change default behavior for gitHubChecker
some fixings
fix test exhibit_should_display_correct_date_in_ce
Improve test launcher script
Merge branch 'master' of https://github.com/a-chumagin/ChronoZoom into improveTestLauncher
Input error messsages base.
Improve error feedback in authoring forms

Details:
1. Add client-side validation error feedback for authoring forms (timeline, exhibit, contentitem);
2. Add server-side validation error feedback for MediaSource input in authoring forms (exhibit, contentitem);
3. Disabled obsolete authoring tests (alert window on error)
Bugfix #682
Triples Guid check
Merge pull request #1093 from yuzhay/Triples

Triples Guid check
Merge branch 'master' of github.com:alterm4nn/ChronoZoom
Merge branch 'master' of github.com:a-chumagin/ChronoZoom
Merge pull request #1094 from a-chumagin/master

Changes for tests
workaround for test
Merge pull request #1096 from a-chumagin/master

workaround for test
Merge pull request #1090 from alex-zen/error-messages

Error messages