Merge pull request #1357 from ZappoMan/edit_particles

Edit Particles
Merge pull request #1358 from ZappoMan/edit_particles

slight toy ball cleanup
We can let qt find things on its own, which will let us add frameworks/plugins inside the bundle
Merge pull request #1359 from ZappoMan/edit_particles

add findClosestParticle()
Merge pull request #1361 from murillodigital/master

We can let qt find things on its own, which will let us add frameworks/p...
Merge pull request #1362 from ZappoMan/edit_particles

Implement Prune for Particle Tree to fix long run time stability.
Merge branch 'master' of https://github.com/worklist/hifi into edit_particles