Checkbox switcher with label
Forked by Tuxosaurus for improved usability (2013-05-23).
Forked by @TjRus for adding transitions.
Original code - @LukyV
Tuxosaurus: I needed something simple and found the fork by @TjRus.
My tweaks:
* works without identifiers
* adds real text label
* uses span elements instead of div inside the label
* features "on/off" status inside the label
* more variables
* class "thumb" renamed "handle"
* reorganised code