Added simple additive/blur-with-persist glow modes, means to cycle through
modes.
initial rev of Doxyfile to generate HTML documentation for our classes
Merge branch 'master' of https://github.com/worklist/hifi into glow
Diffuse/add glow mode.
Merge pull request #851 from birarda/master

intial rev of Doxyfile
Merge branch 'master' of https://github.com/worklist/hifi into glow
Doxygen-style comments.
Blur/add should be the default.
Doxygen comment fix.
Don't make the avatars glow; that was just for testing.
Merge pull request #852 from ZappoMan/voxel_sending_helper

Improvements to Voxel Edit in the client
Merge pull request #854 from ey6es/glow

Three other glow techniques, with menu option to cycle between them.