Particle palm collisions

- Support for "fists" near the center of the palm that can be used to "collide" with particles and punch/hit them
- added support for "inHand" feature of particles that makes them not fall and not collide with other hands
- added "catch" mode to Hand
- added type/version support to SVO files so that particles.svo won't get corrupt of cause crashes when you attempt to read a file with different data

All of these changes make it possible to:
- through a particle
- hit a particle with your hand and make it change direction and velocity
- catch a particle