Update Multilingual App Toolkit
Fix #19
Improvements for Label
Merge branch 'custom'
Add CheckBoxStyle property to LongListMultiSelectorItem
Add ApplicationBarSubmenuItem constructor string overload to better match ApplicationBarItems
Merge pull request #20 from Pepsi1x1/upstream/custom

Add ApplicationBarSubmenuItem constructor string overload to better match...
Improve docs
Merge branch 'custom'