update slider demo to reduce code duplication
convert calendar/datepicker demos into using helpers to reduce code duplication; extend labels capabillity of datepicker
add cardadd/cardremove events to x-deck; optimize x-deck css to reduce duplication; overhaul x-deck demo to reduce code duplication; add tab preserve filter to docs.html template
update site to reflect reduced size
tweak various minor issues with demo pages (removing extra buttons, fixing links, etc)