IScroll scroller in containers with accordion:
 * scroll to opened accordion item and focused add item... input field
 * changed iscroll.js to iscroll-probe.js to get the current scroll position
 * public swipeNext and swipePrevious methods in SwiperService
 * optional scope.disableSwiper parameter in swiperContainerDirective to initially disable swiping in slides with scroller
 * accordionTitleDirective calls refresh scroller (and scroll to element) methdod in accordionDirective after toggle to recalculate container height
 * register focused add item... element to scrollToDirective and scroll to focused element after new item addition
 * initialize scrollToItems scope variable in ng-repeats and watch its size changes to refresh scroller height
 * fire scrollerIncludeContentLoaded on ng-include onload events and refresh scroller
 * scrollToContainerDirective to register scrollers within same feature
 * scrollTo<Top|Bottom>Edge directives for generic pull to next/previous loaders