add ParticleGroup base class. #75
Merge branch 'master' into emitter_scripting_75
Merge remote-tracking branch 'origin/master' into rework_physicsWrapper_particles_85
Merge branch 'master' into rework_physicsWrapper_particles_85
add basic ParticleGroup interface. #85
Implement parts of ParticleGroup interface. 85
alter code which was for debugging. #85
adjust interface from ParticleGroup to better fit scripting. #85
add basic global interface for scripts to particles. #85
add basic implementation of ParticleScriptAccess. #85
add static function to reload all Lua scripts in all instances. #85
setup ParticleGroup scripting. #85
fix lambda function. #85
add visual-update for ParticleGroups. #85
add getta for ParticleGroup from ParticleScriptAccess at index. #85
set default ParticleProperties to (our actual) water properties. #85
add lua script for setting properties of water element. #85
make immutaleProperties setting possible. #85
add script-interface for setting immutable properties. #85
fix passing lambda to LuaWrapper in ParticleScriptAccess. #85