v1.3 test

Fixed startDragging callback - now it pass correct "this" value
Updated owl status method with dragDirection information
Fixed updating currentItem on owlStatus
Included support for lazy load background images
Added afterLazyLoad callback(thx JaySala)
Removed "opacity=0" style while using destroy method.
Fixed afterMove callback. Now its fire only when you successfull slide.
Included new size function itemsAllSizes:false. It allows you to set
number of items accros all widths.
Disable drag gestures if there is no items outside viewport.
scrollByPage fixed
Merge branch 'Scroll-Per-Page' into v1.3-test
prevItem Fix
Update Demos and CSS
Merge branch 'v1.3-test'