Datepicker and day slides fixes:
* prevent clicks in datepicker when swiping
* increment offset from active datepicker slide only when swipe did change slide and was not reseted
* do not change day slide when datepicker slide change was reseted back to active slide
* reset datepicker state when it is closed
* added slideReset callback
* added activeIndex to slideChangeStart callback
* datepicker with click elsewhere
* added previous loop index to Idangero.us Swiper
* do not wrap updateActiveSlide into timeout when slideChangeStart callback is defined to make sure it is run (and others) with correct values