Rewrote variance implementation. Now variance is added inside the Particle class itself.Also added color as an argument in the emitter so we can set quick per emitter color.
Added a routine to get and draw AxisAlignedBoundingBox for the particle system. Not clean implementation at the moment.
Fixed and cleaned code for AxisAlignedBoundingBox computation.
Ported over the Bounding Box routine to a separate class BBox. The idea is to make BBox a generic AABB routine for either Particles or ofMesh. Merging with Master.