Add SupportsRangeNotifications property.
Disable range notifications on when SupportsRangeNotifications is false;
Only .NET45 supports this.
Simplify single item by calling Add, Insert and Remove.
Fix the activation test.
Enable the ThreadStatic stuff for SupportsRangeNotifications.
NotifyCollectionChangedEventArgs why are you stupid?
Finally fix move in Winforms.
Test the ranges.
Merge remote-tracking branch 'origin/rxui6-master' into range-ops
Style
Merge branch 'rxui6-master' into range-ops

Conflicts:
	ReactiveUI/RxApp.cs
Merge branch 'rxui6-master' into range-ops
Fixup ReactiveUI_VSAll.sln.
Merge branch 'rebracer-settings' into range-ops
Fix some references.
Some compile errors.
Fix comments.
Fix Event for the new projects.
Merge remote-tracking branch 'origin/range-ops' into rxui6-master