* added logging of application events
* changed debug mode flag to independent debug modes
* added option to auto-start mission (load a mission immediately
after startup)
* removed "enum value out of range" prints
* some refactoring
* removed classes managed by CInstanceManager
except for CObject, CPyro, CBrain and CPhysics
because of dependencies
* refactored instance searching to use existing singleton instances of
CApplication, CEngine and CRobotMain and calling their getter
functions
- new class CModelManager
- rewritten engine object structure in CEngine
- created shared model data instead of separate objects per each
model instance
- minor refactoring