applyHardCollision() now takes a CollisionInfo rather than two vectors ("penetration" and "addedVelocity")
Compile fixes (perhaps just for my version of Qt/GCC).
Merge pull request #1594 from ey6es/master

Compile fixes (perhaps just for my version of Qt/GCC).
ParticleTreeElement::_particles is now a QList<> instead of std::vector<> for faster erase()
Store hand position relative to body orientation/position.
Removing per-particle calls to usecTimestampNow() which can add up when simulating a lot of particles.
Removing one more usecTimestampNow() call in Particle::update()
Fixing measure of "old" particles while simplifying the math (faster!).
Get the base position/orientation directly from the avatar to prevent
jerkiness when flying with the Hydra.  Also, restore arm lengths when the
Hydra becomes inactive.
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge pull request #1595 from ey6es/master

Fix hand jerkiness when flying (by always keeping the hand positions relative to the body orientation/position).
Modifying how the "particle is stopped" logic reads with minimal modification to how it works.
Adding static friction for easier "catching" of particles on paddle hands.
Merge branch 'master' of ssh://github.com/highfidelity/hifi into paddle-fixes-2
scripts save on exit and load on entry
Merge pull request #1598 from AndrewMeadows/paddle-fixes-2

Paddle fixes 2
Merge pull request #1599 from hifialanwu/master

#19488 scripts save on exit and load on entry
Merge branch 'master' of github.com:/worklist/hifi