Added explanation of configurable selector attribute to documentation
Added explanation of configurable selector attribute to documentation

aidanlister/jquery-stickytabs,modulexcite/jquery-stickytabs,modulexcite/jquery-stickytabs,holtkamp/jquery-stickytabs,timabell/jquery-stickytabs,holtkamp/jquery-stickytabs,timabell/jquery-stickytabs,aidanlister/jquery-stickytabs