EntityItem::setSimulationState() now public
add EntitySimulation and SimpleEntitySimulation
EntitySimulation takes EntityItem* rather than ID
EntityServer gets a simuation
EntityCollisionSystem moves to interface

and interface connects EntityCollision system to EntityTree
EntityTreeHeadlessViewer gets a simulation
merge upstream/master into andrew/thermonuclear
add entities to simulation after unpacking
fix for ice-server heartbeat without an access token
Merge branch 'master' of https://github.com/highfidelity/hifi
fix for custom hifi URL lookup
Find Oculus libraries when using Visual Studio 2013
Update build instructions for VS2013 Community and Professional
Add option for white grid color
Darken colors of selection/highlight boxes
Update the tool window to use tabbed windows
Add rotation degrees overlay
Fix stretch tools not following mouse correctly
Fix position of rotation degrees display

The position of the display was not always correct depending on the
camera orientation relative to the selection.
Update normalizeDegrees to be exclusive on the -180 end