Update controller to fix optionLabel issue.

The optionLabel doesn't show up for multiple dropdowns bound to the same configuration object - only for the last one. This only happens when the DataSource is created using new kendo.data.DataSource. Literal declaration is fine.
Fix for issue https://github.com/kendo-labs/angular-kendo/issues/50
Update to latest version of Kendo UI (2013.3.717)
Build file