added TweenJS as external library
included TweenJS in html files
use TweenJS in favour of of tween implementation
removed inclusions of engine/time/tween
removed unused files for tweening
unabled debug print for the creation of world objects
added interaction method to Layer as a light-weighted alternative to
InteractionHandler
make Layer interaction configurable using a callback method
removed initMouseInteractionMap in favour of a simple callback method
removed initMouseInteraction in MapScene
removed includes of basic/interactionhandlerbuilder
removed InteractionHandlerBuilder
removed initMouseInteractionEditor in Layer
removed inclusions of basic/interactionhandler
mouse-independent transition from TitleScene to MapScene
bind mouse buttons to globally accessible events
removed mouse from TitleScene
removed Mouse from MapScene and EditorScene
removed mouse from Jiquid.System
revomed Mouse from Entity