Changed the flat selector model to support multiselection
Merge from TagSelector, fixed integration problems
Merge branch 'master' of https://github.com/Sitefinity/feather into TagSelector
Merge branch 'development' of https://github.com/Sitefinity/feather into TagSelector
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
bug #275992 : added correct request filter for searching in multilingual items
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 'development' of https://github.com/Sitefinity/feather into MultiSelect

Conflicts:
	Telerik.Sitefinity.Frontend/Selectors/list-selector.js
	Telerik.Sitefinity.Frontend/Selectors/news-selector.html
	Telerik.Sitefinity.Frontend/Selectors/taxon-selector.html
Fixed client test
Added client tests for mulitselection