Fix eyePosition so that lookatVectors point directly to eyes,
even when looking at someone from above.
LookatIndicator now scales with the avatar's scale.
Replace var in renderLookatIndicator with const IDENTITY_UP
Merge pull request #720 from LionTurtle/master

Fix eyePosition so that lookatVectors point directly to eyes,
made some extra checks for bogus data coming in, and added more particle effects to rave glove hand
Merge remote-tracking branch 'upstream/master' into particles