Merge branch 'master' of https://github.com/highfidelity/hifi
Keep track of keys pressed, synthesize release events when focus is lost.
Closes #2375.
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi
Added a "flat" mode for environments that makes them follow you around on the
X/Z axes.  The default environment is flat.  Closes #2378.
Merge pull request #2401 from ey6es/flatmosphere

Added a "flat" atmosphere mode (the default) that makes the atmosphere follow you around on the X/Z axes.