Experimenting with a logging class
Merge branch 'graphics' into feature-logging
Logging system uses string streams

since it is easier that way, instead of making my own
Sound system uses logging
Graphics system uses logging
Merge remote-tracking branch 'meisaka/feature-logging' into develop

Conflicts:
	src/systems/graphics.cpp
	src/systems/sound-system.cpp
	tests/CMakeLists.txt