add new example
add texture attribute to TilesetImage, improve performance of flash copyPixels based renderer
add waffleio badge to readme
add new example: desert_gigantic (100x100 map)
make public stuff read only, fix #41
add support for transparent color in tilesets, fix #39 (sadly does not work on flash target)
add perspective walls example in xml
add support for background colors, fix #44
fix isometric related bug in flash
add invisible layer (for testing purpose)
add support for layer visibility, fix #46
fix bug which caused app to crash if a TilesetImage did not have a fixed size (image size will now be determined dynamicly)
modify examples
change html5 resolution in desert
fix bug which caused flash target to draw a white background if no background color is selected
update haxelib.json to v0.4.1