add general skeleton
add example of usage
add addSource to sprite
fix typos
update example
fix typos
fix reserved word conflict
use working sprite example
add addSourcesByUrl; fix frame incr bug
update example to show animated sprite
fix prototypal inheritance with Element
update example to use element inheritance
fix missing property bug
update example to use stage
fix modulus error
allow creation of elements with init params
clear buffers before draws
update example to use multiple elements
make sprite modes private
add framecount to stage