Add Aero/Acrylic/Mica effects for the window 为窗口增加Aero、云母或亚克力效果

[akchiji888]

Why not add Aero/Acrylic/Mica effects for the window?(It can make the window more beautiful and modern) 如题，Aero/亚克力/云母效果可以让窗口更加的美观，并且适合一些现代化的软件

而且更适合我来装杯(bushi

[wherewhere]

https://github.com/wherewhere/ModernWpf/tree/master/ModernWpf%2FTitleBar%2FBackdrop

[xEsteem]

Any news on this coming to the main repo? @wherewhere could you do a pr?

[wherewhere]

Nop. My repo left too many commits. I can't merge it now...