added avatar shadow
fixed a physics bug in avatar body spring (forgot to use deltaTime) - and adjusted various physics constants accordingly.
Merge remote-tracking branch 'upstream/master'
added avatar data file stuff that got lost during a merge or something
Added basic ray intersection testing to VoxelTree.
Remaining pick bits.
Pointers to references for in/out parameters, renamed line parameter to more
descriptive "distance."
Missed a spot with the conversion from pointers to references.
Merge branch 'master' of https://github.com/worklist/hifi

Conflicts:
	libraries/voxels/src/VoxelTree.h
Merge pull request #195 from birarda/invensense

a basic setup to connect to invensense gyros
Merge pull request #198 from ey6es/master

Support for generating pick rays and finding intersections between rays and voxel nodes.
a few small formatting and glitch fixes
Merge remote-tracking branch 'upstream/master'
thingy
Merge pull request #196 from Ventrella/master

fixed physics bug and added avatar shadow
add missing newline to root CMakeLists
Merge pull request #200 from birarda/master

add missing new line to CMakeLists
improved avatar gravity code and moved source of gravity vector to main.cpp
Merge remote-tracking branch 'upstream/master'
update timestamp variables in Agent, use new packet headers for DS