Added debug boolean property to game. File now logs asset loading if debug is on.
Further testing of creation of dom nodes
Merge branch 'dev' into standofftest

Conflicts:
	src/textures/TextureLibrary.ts
Refactored library rebuilds out of stateManager into the libraries - necessary for optimising texture rebuilds
Changed TextureLibrary to use single canvas for rebuilding images.
Merge branch 'standofftest' into dev
Release notes for version 0.5.2
Merge branch 'dev' of https://github.com/gamelab/kiwi.js into dev