Strapd v.0.2.1

Added window.load method for StrapdMark, and restructure the Library
into three version: Strapd API(base API: only app state, ua detection
and base of StrapdMark), Strapd(base API + Strapd.vectorize()), and
Strapd Full(Strapd w/ Mark Engine add-on methods/jQuery replacement)