Fixed single el bug for roll on action
Added rollOn function.
Fixed queue for overlaping scrolls. Fixed test page.
Fixed bug with default options. Added additional support for window s…
…crolling. Added shift optinon support for numbers
fixed to work with jQuery 1.9. Added userstoproll.
Added support for jQuery 1.9 and 2.0b
Fix shift addition
removed undefined from self-invoking function
Added horizontal scrolling option
added readme and some fixes