uploaded lua & luabind
delete_entity now can redirect entity_ptrs to another entity
purified entity.h/cpp
b2Filter instead of group index
merged stream components and emitter components

particle emissions now have proper render ordering and may overlap each other
b2Filter added to topdown::create_physics_component
corrected collision resolving
now taking both colliders into consideration
only_children option in destroy_system
body impact on death
camera transforming transferred to draw routines
also introduced particles_renderable
bugchecks
introduced working script interface