9/22/2015:
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	- created Changelog
	- fully documented world.h, world.cpp, entities.h and entities.cpp
	- fixed interpolation
	- made entities dynamically allocatable

9/23/2015:
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	- fully documented ui.h and ui.cpp
	- converted most world functions to only needing a Player pointer
	- added entity-world binding, so that only a single world draw()/detect() needs to be called per loop in main.cpp
	- added dialog boxes and a key binding to acknoledge them (make them disappear)
	- added a togglable debug overlay thing (F3)
	- added villages