First thing is first: Remove SizeToContent.
Oops, forgot something.
Breaking change: changed MessageDialogContainer to MetroDialogContainer.
Added the InputDialog.
Fixed the accented color scheme's transparency by using HighlightBrush instead of AccentColorBrush (which has 80% transparency by design). If it ain't broken, don't fix it.
RequestClose is now RequestCloseAsync. It now works for dialogs inside of user-created MetroWindows too.
Added the ```UseAnimations``` setting.
Wat
Merge pull request #901 from Amrykid/metrodialogs-v4

[WIP] MetroDialogs v4