add 'stay_open' option with default value initializer
check stay_open option for before closing the select list after user selects an item
build
Merge branch 'master' of git://github.com/jacobsimeon/chosen

Conflicts:
	chosen/chosen.jquery.js
	chosen/chosen.jquery.min.js
	chosen/chosen.proto.js
	chosen/chosen.proto.min.js
	coffee/chosen.jquery.coffee
	coffee/chosen.proto.coffee
	coffee/lib/abstract-chosen.coffee