Major changes.
- the rapidJSON parser has been added in source.
- using the rapidJSON, now a setting file can be load in order to override the hard-wired defaults for constants (move the template objects/settings.ces in CAD_conveyor/settings.ces of the build directory)
- the code for force computation has been moved to ElectricForces.h, and a class has been created for storing settings related to electrode stuff
- the creation of particles will be based on new stuff in ChParticleEmitter.h (WORK IN PROGRESS)
- lot of unused stuff cleaned and removed
Adding template settings.ces in objects/, it must be placed in CAD_conveyor/ directory so that conveyor.exe will find it.