Moved globalGuideProvider out of ParticleBehavior.

This guide provider now has to be set in the velocity providers
(and a few other places) where it is being used.

Related methods were removed from Particle and AbstractParticle.
Moved globalGuideProvider out of ParticleBehavior.

This guide provider now has to be set in the velocity providers
(and a few other places) where it is being used.

Related methods were removed from Particle and AbstractParticle.

Some code cleanup.