Changed the flat selector model to support multiselection
Merge from TagSelector, fixed integration problems
Selectors UI test fix
Merge branch 'master' of https://github.com/Sitefinity/feather into UnitTestsFix
Merge branch master
Merge branch 'development' of https://github.com/Sitefinity/feather into MultiSelect
Added checkboxes and ability to select and deselect multiple items
Merge from branch development
Fixed jshint error
Fised unit tests for news selector
Added unit tests for single selection mode
Fixed issue when updating the selected items
Added some tests for multiselect mode
Fixed wrong property name
Fix in the unit tests' tear down
Added unit test for multiselect mode
Merge branch 'master' of https://github.com/Sitefinity/feather into development
Merge branch 'development' of https://github.com/Sitefinity/feather into development
Fixed bug in the selection when two selectors are binded to one property
Merge branch 'SelectorFix' of https://github.com/Sitefinity/feather into UnitTestsFix

Conflicts:
	Tests/Telerik.Sitefinity.Frontend.TestUI.TestCases/MvcWidgets/MvcSelectorTest.cs