Add undo/redo implementation
Each document now has its own IUndoRedoManager

Also add History tool, similar to Photoshop's history palette
Remove unused code
History panel items are now clickable
Port VS2010 theme from Edi (edi.codeplex.com)

Thanks Edi!
Don't show history tool at demo startup
Add "Initial State" item in history tool
Add support for multiple status bar items
Create StatusBarView to separate status bar more cleanly from shell
Refactor MainMenu into its own module
Refactor ToolBars into its own module
Move shell-specific controls
Add slider to history tool
Refactor undo / redo toolbar buttons
Remove empty file
Add convention-based inspector builder
Added real-time scripting demo

Implemented saving / loading of window layout
It's not a cube, it's a helix.
Inspector editors now update when value is changed elsewhere
Format numbers in TextBox inspector