onUp/onDown: add support for ng expr
the angular expression string must evaluate to a function reference
fixing/updating documentation
repl scrollY w pageYOffset for ie compat
Merge pull request #2 from DanMMX/master

repl scrollY w pageYOffset for ie compat
added sparkSetup.disableSparkScroll, .disableSparkScrollAnimate
refact optional require deps setup
rmv all require stuff (must now expose _, Rekapi, AnimationFrame on window)
compat
fix gsap link
note re disable invalidation interval in $destroy
rmv un-used  injection
minification protection
Merge branch 'master' of https://github.com/gilbox/spark-scroll
Merge branch 'master' into gh-pages