* Created the LayoutManager plugin.
* Created the PlanarLayout (animated) plugin.
* Added message triggering functionality for Layouts, by name.
* Added scale transition to PlanarLayout.
* Navigable scene objects will no longer be tiled.
* Added a Snap (as opposed to Animate) Planar Layout as part of the same plugin.
Merge branch 'master' of https://github.com/CalVR/calvr_plugins

Conflicts:
	common/PluginMessageType.h
Merge pull request #7 from johnmangan/master

Added the LayoutManager and PlanarLayout plugins.