move view frustum management to VoxelAgentData class
Massive migration from GLUT/globals to Qt/class members.  Mostly there.
Merge branch 'master' of https://github.com/worklist/hifi

Conflicts:
	interface/src/Application.cpp
	interface/src/Application.h
Various fixes, removed the bulk of main.cpp.
Disable the menu shortcuts for "regular" keys when the chat entry is showing.
added printDebugDetails()
first cut at delta view frustum encoding
move view frustum calculation into VoxelAgentData, added last known and current
first cut at delata view frustum encoding
Merge branch 'master' of https://github.com/worklist/hifi into render_voxels_optimization
Missed some comments in transferring from main.cpp to Application.h; trying to
preserve original formatting.
Accidentally left a debug line in.
Allow changing the edit voxel size using the mouse wheel.
added new menu items for view delta
added wantDelta, made want bools a bit mask
added setAtBit() utility
tweaks to view frustum delta code
tweaks to view frustum delta code
Merge branch 'master' of https://github.com/worklist/hifi into render_voxels_optimization
Merge branch 'master' of https://github.com/worklist/hifi

Conflicts:
	interface/src/main.cpp