Added

• Core: its now possible to specify a custom renderer (that extends the default Renderer class)

Changed

• General: further code revamping to make melonJS more modular and allow instantiation of different app/games
• Physic: new Detector class instantiated by each physic world instance to detect and solve collisions

Fixed

• Core: fix missing TS definitions when publishing on NPM (following changes in #1162)
• Doc: fix fps type in the World class