Added WMF Graphics

This is to support adding vector graphics to Windows' clipboard.
Added support for Brushes, Ovals, Rects to WMF
[WMF] Added Twip Mapping Mode
Add beginnings of WriteableBitmapExGraphics
Beginning work on new D2D Graphics
Added more capabilities to D2D Graphics
Added Keyboard info to touch began
Made Transform2D operations more efficient
Direct2D can now render to the screen using a SwapChain from a SwapChainBackgroundPanel
Renamed SilverlightGraphics to XamlGraphics
Renamed Silverlight files to Xaml
Made SVG Graphics culture invariant
Added Clear method
Fix Xaml Polygon caching
Added touch and mouse support for WPF
Finally wrote an AssemblyInfo.cs
Fixed up the ignores for Windows
Fixed usings for Win Store apps
Initial NuGet packaging scripts
More cleanup to make the NuGet version good