add rounded rectangle functionality
fix attachment scope of rounding functions
remove clone function that messes with jquery/twbs
add rounded rectangle demo
add scale parameter to io.setBGImage
fix mouse coordinate for FireFox
fix object flicker bug (stop self-clearing when fps is set)
update playAnim with new parameter for self drawing
change Grid's parent to Shape, add image functionality
add text editing functions and demo
add fn param for keyboardEdit
add optional fn parameter to setAnim
fix parameter description for setAnim
fix fn call location in setAnim
fix array bug on line 1683, rename array vars
add play1Anim, fix Anim draw bugs
Merge pull request #1 from sbiermanlytle/master

合并原作者的更新