started work on resending nacked packets
completed code to resend nacked packets on AC
started work on sending nack packets from client
Merge remote-tracking branch 'upstream/master'
client-side nack sending complete; ready to test
added write lock/unlock

...for _octreeSceneStatsLock
added random packet drops; ready to test
Merge remote-tracking branch 'upstream/master' into packet_recovery_pull
packet recovery seems to be working

Seems to impact FPS a lot.  OctreeSceneStats is not being locked (causes
freezing, need to find out why).
removed interface print statements
added octree scene stats locking and unlocking
Simple raypicking for scripts with oculus rift.
moved around code in sendNack() a bit
Merge branch 'packet_recovery_pull'
removed debug code
removed an extra space
removed more spaces
removed debug prints in parseNackPacket()
removed another extra space
Merge pull request #3001 from Barnold1953/OculusOverlay

Simple raypicking for scripts with oculus rift.