Updated ModelSync.Local code
Unit tests for ModelSync.Local
Updated Model docs with ModelSync.Local usage
Updated App metadata with ModelSync.Local
Update App's unit testing HTML with ModelSync.Local
Update build.json with ModelSync.Local
Improving returned errors in local syncing.
Additional test case for errors such as QUOTA_EXCEEDED_ERR
Fix a issue with cloudn't select a date when passing minimumDate

This issue happen in select any dates by selectDates()
method when passing minimumDate configuration. Fix #1030.
Improved ButtonCore's handling and preservation of HTML labels
Added tests to ensure nested labels behave correctly
Added labelHTML ATTR to Y.Button and Y.ButtonCore, and restricted the label ATTR to non-HTML.
Updated HTML label tests to reference the labelHTML ATTR
Added escape to ButtonCore dependencies
Documentation updates.  get('label') now returns the 'text' attribute of its host node.
Added test
Fixed failing Selleck tests
Fixed failing tests in IE
Merge branch 'dev-3.x' into button-labels
* Enhancements to ButtonCore allowed for simplification of Y.Button by removing most of the now unneccesary prototype properties.
* `Y.Button.ATTRS` now points to `Y.ButtonCore.ATTRS`
* Improved code documentation