Provide a gray background for the chat entry, so that we can see what we're
typing.
Added shadow and outline effects to TextRenderer, use the shadow effect in
our text to separate it from the background.
Merge pull request #335 from ey6es/master

Added gray background for chat entry, shadow/outline effects for text rendering.  Enabled shadows for text contrast.
Merge branch 'master' of https://github.com/worklist/hifi
Merge pull request #334 from PhilipRosedale/master

Mouse moves pitch, yaw when near screen edge, gravity bouncing fixed!
Merge branch 'master' of https://github.com/worklist/hifi
Added acceleration decay of pitch (you look up/straight if you start moving)