[TIMOB-18707] Windows: Support Ti.UI.View border* properties

http://docs.appcelerator.com/titanium/3.0/#!/api/Titanium.UI.View-property-borderColor http://docs.appcelerator.com/titanium/3.0/#!/api/Titanium.UI.View-property-borderRadius http://docs.appcelerator.com/titanium/3.0/#!/api/Titanium.UI.View-property-borderWidth Looks like the simplest way to achieve this stuff is to add the components underneath a Border: https://msdn.microsoft.com/en-us/windows/windows.ui.xaml.controls.border http://stackoverflow.com/questions/16341788/how-to-clip-content-with-rounded-corners-in-windows-store-app