Update FlatSlider.xaml

User can define width of vertical slider / height of horizontal slider
Update Icons.xaml

Added the following icons:
appbar_bold
appbar_italic
appbar_underline
appbar_font
appbar_fontsize
appbar_fontsize_increase
appbar_fontsize_decrease
appbar_textcolor
appbar_marker
Update TransitioningContentControl.cs
Update MainWindow.xaml
Update MainWindow.xaml.cs
Update GlowWindow.xaml.cs

Fixes the cursor when owner.ResizeMode is ResizeMode.NoResize or ResizeMode.CanMinimize.
Merge remote-tracking branch 'MetroBehind/master'
Changed watermark margin to same settings as in textboxes
Tab showing accent brushes
fixing external dialogs (fixes #994)
naming
Merge pull request #996 from thoemmi/issue-994

fixing external dialogs (fixes #994)
Merge pull request #858 from HansHuang/patch-1

Update FlatSlider.xaml
Merge pull request #970 from holgergubbels/patch-1

Changed watermark margin to same settings as in textboxes
Indentation fixed

Strange, I thought everything was indented correctly...
Merge pull request #910 from Dotnetifier/master

Added icons and added TransitioningContentControl transition feature
Merge pull request #936 from 100GPing100/patch-3

Fix glow cursor when ResizeMode is NoResize or CanMinimize
ExternalCloseButton, IsPinnable->IsPinned, Docs.

Added property ExternalCloseButton
Renamed property IsPinnable to IsPinned
OverrideExternalCloseButton + OverrideIsPinned

Added property OverrideExternalCloseButton
Added property OverrideIsPinned
Flyouts IsPinned functionality