Initial Xwt Window
Add custom widget for output
More IView
Correct separator in the Menu
Exiting on closing
Beginning UI content
Fix text alignment on output
More IView, plus Handlers
Switching for the Xwt window
Fix filename dialogs to return filename instead of current folder.
Get populating the treeview working correctly.
Updating of controls are invoked to the main thread.
Merge branch 'develop' of https://github.com/mono/MonoGame into thiagoabreu-pipeline-gui

Conflicts:
	Build/Projects/Pipeline.definition
Protobuild definition for MacOS,Linux version of Pipeline tool.
Repurposed PipelineReferences.definition for the Pipeline project.
Previous PipelineReferences.definition is now Framework.Content.Pipeline.References.definition.
Remove unused using statements that caused problems cross-platform.
Moved and added missing file for Xwt project.
Added shell scripts for Mac and Linux to run Protobuild.
Changes to get Mac Pipeline project to build. Doesn't run yet, but it builds.
XS wanted to add these Info.plist files for Test and MGCB.
XS wanted to change some nodes in the Lidgren Mac project.
Pipeline.Mac project builds, but doesn't launch.
App builds and kinda runs.
Merge branch 'develop' of https://github.com/KonajuGames/MonoGame into thiagoabreu-pipeline-gui

# By Tom Spilman (136) and others
# Via Tom Spilman (59) and others
* 'develop' of https://github.com/KonajuGames/MonoGame: (229 commits)
  Fixing typo
  Fixed test to have correct background color even in release builds.
  Fix to allow GraphicsProfile.HiDef when GraphicsAdapter.UseReferenceDevice is enabled.
  Removed now unnessasary GraphicsProfile.HiDef.
  Enabled GraphicsProfile.HiDef and GraphicsAdapter.UseReferenceDevice for all visual tests by default.
  Support GraphicsAdapter.UseReferenceDevice in DirectX desktop and WinStore.
  Added GraphicsAdapter.UseReferenceDevice.
  Cleanup and documentation pass.
  Some GraphicsAdapter cleanup.
  Replacing string.Format calls with string.Concat
  EffectParameter now shows its current value in the watch window.
  Document Rectangle's public properties and fields, and remove some whitespace for consistency.
  Removed SpriteFontDescription.CharacterRegions ( did not exist in xna ). Added SpriteFontDescription.Characters Removed SpriteFontDescription constructor taking a region list  ( did not exist in xna ).
  Remove some #ifs
  Fix typo in previous commit.
  Document Point() constructor.
  Document Point.ToString() method
  Document Point.Zero property.
  Using new technique for comparing frames which gives us much better matches.
  Lowered image comparision tolerance slightly.
  ...
Add PropertyGrid.
Adding history support to pipeline tool using IsolatedStorage.