Added 'pageChange' event as a paginated ScrollController stops and the visible page has changed. Updated docs.
Changed 'pageChange' event name to 'pagechange'.
Added 'pagechange' event support for right/bottom-aligned content.
Updated event data for 'pagechange' event.
'pagechange' event is now triggered as soon as visible page changes.
Updated docs.
Merge pull request #27 from toostn/pageChange

Added 'pageChange' event to ScrollController