Use the sun location in the environment to set the light position.
Merge branch 'master' of https://github.com/worklist/hifi
When we add voxels, add them with the selected color.
Merge branch 'master' of https://github.com/worklist/hifi
Turned the voxel edit commands into menu options for better visibility.
When in add mode and there's no voxel under the cursor, place the mouse voxel
a fixed distance away.
Support dragging when in coloring mode.  I tried it in add/delete mode, too,
but it felt messy.
Moved voxel options into their own menu, switched destructive flag to check
Qt action.
Merge branch 'master' of https://github.com/worklist/hifi
Merge pull request #316 from ey6es/master

Voxel editing improvements: apply color on add, menu items, free placement, dragging.