Wrong class resolving

[senyaak]

#

selectr/src/selectr.coffee

Line 47 in 12d92a5

.addClass "selectr panel panel-#{@args.panelStyle} #{'multi' if @multi}"

If the multiple attribut is not set on the element - the "undefined" class will be added. It is in all cases where string interpolation is used.
I would make a pr, but I didn't have worked with coffee script, so it would be nice if somebody fix that)

[senyaak]

PS I would be nice too if you could add classes to element