Rename IDrawwable file.
Merge branch 'master' of github.com:ikeough/Dynamo
Merge branch 'master' of github.com:ikeough/Dynamo
DynamoSliderClass for undo/redo able slider
Replaced "Dictionary<string, object> data" in ModelEventArgs with strongly typed properties
Merge branch 'master' of github.com:ikeough/Dynamo
First progress in getting the new visualization manager working.

New visualization manager files and move IDrawable.
Recover IDrawable.
Mod the proj file for the recovery of IDrawable.
Merge branch 'master' into VizManager
Remove dynIDrawable again.
Merge pull request #506 from Benglin/ModelEventArgs

Removed "Dictionary<string, object> data" in ModelEventArgs
Added DynamoMSOfficeTests, First Excel tests, Added Cleanup call to DynamoController.Shutdown
All file reading tests pass for Excel, including empty cells
Update attractor sample
Get RenderDescription back. Add Visualization class.
Move the ASM vis manager into core. Fix mesh redraw issue.
Avoid circular update.
Remove this stupid warning.
Merge pull request #505 from ambarish-prakash/DynamoSlider

DynamoSliderClass for undo/redo able slider