Kill the everything marked as obsolete with :fire:
Introduce minimize and restore animations
fixes #1512 : Bad named events
Fix null access when GlowWindows are null
Delete redundant Canvas

The "appbar_github" will be merged anyways with the resources from
Icons.xaml.
Merge pull request #1522 from mrahhal/mrahhal-delete-unused-resource

Delete redundant Canvas
We don't even use Json.Net
Merge pull request #1513 from MahApps/remove-obsolete

Kill the everything marked as obsolete with :fire:
Merge pull request #1518 from xxMUROxx/hotfix/NumericUpDown-EventName

NumericUpDown : Fix Badly named events
Merge pull request #1514 from AdditionalPylons/restore-minimize-animations

Introduce restore and minimize animations
Include the TabItem clode button visual directly, so we don't have to have a dependency on the icons project

Fixes #1524
Made Flyout.cs compatible with the theme XAML
Modified Flyout animation to match Windows 8 animation
Added the AnimateOpacity property
Added the Opacity animation

NOTE: code formatting changes that Visual Studio made are also 'seen' by Git.
One demo flyout now has opacity animation