fixed broken toggle action in case of radio inputs #312
Merge branch 'develop' of https://github.com/root-talis/bootstrap-switch into root-talis-develop

Conflicts:
	dist/js/bootstrap-switch.min.js
Merge branch 'root-talis-develop' into develop
Added option "allowAllOff" for explicit specification of that it should be
possible to uncheck all radio buttons in a group. Defaults to false.