Fix: Unit tests
fix authoring
fix BL tests
fix locator for button
Add unit tests for ValidateContentItems()
#253. Authoring: Exhibit:Timeline: There is no validation for start date and end date fields
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom into atvalidatefix
#253. Additional commit, improved year validating
Add test for validate year in EditTimeline form
Merge pull request #258 from a-chumagin/master

Fix UI and Bl tests
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom into atvalidatefix
Minor update of year validation in datepicker
Merge pull request #256 from alex-zen/atvalidatefix

#253. Authoring: Exhibit:Timeline: There is no validation for start date and end date fields
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom into forms