Refactor entityfactory/tests.d to 100 line limit
Refactor eventhandlers/inputwindow.d to 100 line limit
Refactor eventhandlers/inputwindow.d into separate files for 100 line limit
Refactor systems\collisionhandler.d to 100 line limit
Delete unused file
Remove unneeded relation components
Refactor systems/relationhandler.d to 100 line limit. Move relation components to separate files