WinForms: Optimize Label by caching the measured size
WinForms: Remove use of TableLayoutPanel from Scrollable
Control.SetParent is now internal, accessed by protected Container.SetParent/RemoveParent methods for implementing containers
WinForms: Fix visual artifacts when adding controls at runtime, and increase performance significantly.  Fixes #116
Wpf: Another pass at to fix some issues sizing controls to a table cell/dock container, using similar structure as winforms with x/yscale propagation, and using MinWidth/MinHeight instead of setting Width/Height.
No longer need to use Suspend/Resume when setting content property - since it's just one line it should do this automatically.
Minor cleanup
Add GTK# 3 to supported list, and Android to under development.
Move InstanceWidget.DataContext and changed event to Control. Fixes #109
Removed unnecessary InstanceWidget.StyleChanged event. Fixes #108
Get rid of finalizer in Widget/WidgetHandler, as they should only be implemented in classes that actually reference unmanaged resources
Remove WidgetHandler.WidgetID from debug builds
Misc cleanup
Mac: Revert BitmapHandler.Dispose implementation - it was only used for testing
Wpf: Revert change to test IsLoaded when ensuring a control is loaded in a separate thread
Wpf: Windows should flag contents as scaling
Update to 1.2.1
Merge branch 'release/1.2.1' into develop
Ignore VS upgrade logs
Wpf: Use positive infinity when measuring combo box to attempt to fix #83
Mac: Can now use built-in retain method
Simplify sample template delegates