Update entity editing to force SPACE_LOCAL for single-selection
Fix rotation overlay size with multi-selection
Fix deletion with multi-selection
Disable properties menu with multi-selection
Add UndoStackScriptingInterface and support when editing entities
can warp at any yaw angle
Update ScriptUndoCommand to run on ScriptEngine thread
expose AvatarList to Interface SE, add avatarWithDisplayName method
Merge pull request #3640 from PhilipRosedale/master

can warp at any yaw angle
Merge pull request #3641 from birarda/avatar-by-name

return an avatar to script by their display name
Add IsFacingAvatar getter and setter to Text3DOverlay
Add countdown to HMD calibration billboard
don't erase from the AvatarHashMap on the wrong thread
Merge pull request #3638 from huffman/entity-tools-updates

Entity tool fixes
Merge pull request #3643 from ctrlaltdavid/rift-calibration-countdown

Rift calibration countdown
Merge pull request #3645 from birarda/avatar-by-name

fix for AvatarHashMap crash when erasing avatars
Fix for digging into converted heightfields.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels