Preparing for new version of playground
Merge branch 'master' of https://github.com/BabylonJS/Samples

Conflicts:
	Playground/index - debug.html
	Playground/index.html
	Playground/index.js
	Playground/scripts/Intersections.js
	Playground/scripts/actions.js
	Playground/scripts/advanced texturing.js
	Playground/scripts/animations.js
	Playground/scripts/basic elements.js
	Playground/scripts/basic scene.js
	Playground/scripts/cameras.js
	Playground/scripts/collisions.js
	Playground/scripts/height Map.js
	Playground/scripts/import meshes.js
	Playground/scripts/lights.js
	Playground/scripts/materials.js
	Playground/scripts/particles.js
	Playground/scripts/picking.js
	Playground/scripts/rotation and scaling.js
	Playground/scripts/scripts.txt
	Playground/scripts/shadows.js
	Playground/scripts/sprites.js
	Playground/zipContent/index.html
Removing unused files