Merge branch 'master' of https://github.com/worklist/hifi into keep_local_voxels
Merge branch 'master' of https://github.com/worklist/hifi into keep_local_voxels
memset to 0 in VoxelNode to address potential memory corruption
Merge branch 'master' of https://github.com/worklist/hifi into keep_local_voxels
Progress towards shadow maps.
More progress on shadows.
Use compare mode.
Working on the "real" shadow volume.
Merge branch 'master' of https://github.com/worklist/hifi into shadowplay
Merge branch 'master' of https://github.com/worklist/hifi into keep_local_voxels
Merge branch 'master' of https://github.com/worklist/hifi into shadowplay
Merge pull request #1283 from ZappoMan/keep_local_voxels

fix potential crashing bug related to incorrectly initialized memory
Merge branch 'master' of https://github.com/worklist/hifi into shadowplay
Lighten the shadows, remove some debug code.
Linear filtering for more smoothness.
Don't leave out the head when we draw our shadow.
Fix for Leap drive enabled without Leap.
Stretch out shadow volume to encompass all avatars.
Make this a constant.
Merge pull request #1284 from ey6es/shadowplay

First pass at shadow maps of avatars on voxels.