The classes in ChDistribution are in chrono:: namespace, now
New important feature: the 'particlefactory' namespace & source directory.
This directory contains new classes for generating flows of particles, with random shapes, positions, alignments, etc.
Each randomized feature (shape, size, etc.) can be defined using one or more distributions from the recent ChDistribution.h collection, ex the normal distribution, the Weibull distribution, the exponential distribution, discrete distributions, etc.
This extremely modular approach can be used to generate infinite types of mixtures.
Nte that this is still a work in progress; in future I'll merge also Radu's code for creating volumes filled with particles.
Things to do: make the generator 'templated' so that one can also generate GPU bodies or who knows in future, and also add a ChParticleGenerator of the type 'generate from particle samples', that will clone sample particles (but sharing their visual assets and the collision shapes, to save memory!!).
Also, add more demos.