Refactored abstract method creation
added layers
layer bugfixing
moved some classes, added layer manager
more layer work
non working layers
working layers - still needs parallax support
changed 'collision' to 'tiles' layer name in levels
loading graphic layers works with right order
centered images in image layers
working paralax (not for zoom)
preloading all image layer images
added backgrounds to stones level
added transparent longon background
Merge branch 'layers'