Adding sort support

currently only in very naive form (re-attaching *all* elements upon a
sort). This will need to change, since add() triggers sort()
Restructuring examples

Now using a compile step (although still using source maps) for the
source files, so they can be run locally. CoffeeScript compiles conflict
with browser security rules preventing local/file execution of the
examples.

Also switched to Zepto over jQuery for a small size (and proof of
concept)
only using mapped in examples