Fixed issue with mouse pressed state, use mouse buttons to add/delete voxels
(numbers now switch between modes).
Working on adding an "add voxel in front of avatar" command.
Show the voxels to be added/deleted as wireframe cubes.
Starting on coloring support.
Adding/removing voxels at different sizes.
Merge branch 'master' of https://github.com/worklist/hifi

Conflicts:
	interface/src/main.cpp
Merge branch 'master' of https://github.com/worklist/hifi
Use isColored, not getShouldRender.
Merge pull request #272 from ey6es/master

Improvements to voxel editing: show what you'll be adding/removing/coloring, allow adjusting the desired size.