Enhancements:
#478 Time and TimePicker ngModel support
#480 Calendar and DatePicker ngModel support
#481 Trap focus in modal
#483 Make popover open/close functions public
#486 Selecting calendar month/year displays day selection grid
#490 Add toolbar dropdown styles
#492 Add file input feature
Bug fixes:
#472 Fix expressionchanged error when using ngIf on tabs
#475 Update panel to match fiori-fundamentals
#493 Hide popover body if contents are empty