- added debug outputs
- added doxygen doxyfile
- added doxygen documentation

class Orb:
- added constructor Orb(GlobalEnums::Biomes)
- added some members and flags

class Universe:
- added randomizer for biomes in init()
- changed return type of generateOrb() from reference to pointer
- changed value-type of orbs_<key, value> to from Orb to Orb*
- changed type of start_orb_ from pair<> to uint32_t

class WorldGenerator:
- added destructor

stdafx.h:
- added preprocessor constant DEBUG_MODE