Added most basic features

Conflicts:
	Makefile
	README.md
	src/collision.cpp
	src/collision.h
	src/engine.h
	src/game.cpp
	src/game.h
	src/gameobject.cpp
	src/gameobject.h
	src/ids.h
	src/input.cpp
	src/input.h
	src/objectmanager.cpp
	src/objectmanager.h
	src/render.cpp
	src/render.h
	src/resourcemanager.cpp
	src/resourcemanager.h
	src/sprite.cpp
	src/sprite.h
	src/vector.cpp
	tests/object_manager/Makefile
	tests/object_manager/src/main.cpp