- refactored CTerrain code - fixed some minor bugs
- added stubs for functions in CLightning, CParticle and CPyro - cleaned object.h and physics.h headers - created temporary stubs to compile CCamera - other necessary changes to compile successfully
Rewritten old code; doesn't compile yet because changes in other modules are needed.
- moved abstract core to src/graphics/core - moved proper graphics engine to src/graphics/engine