Slider events not being called
Slider events not being called

Slider events defined as attributes were not being called. Updated
invoker function with proper signature.

kranthitech/angular-bootstrap-slider,sagoAguilar/angular-bootstrap-slider,sagoAguilar/angular-bootstrap-slider,matiasdelgado/angular-bootstrap-slider,seiyria/angular-bootstrap-slider,j-a-m-l/angular-bootstrap-slider,matiasdelgado/angular-bootstrap-slider,hristozov/angular-bootstrap-slider,j-a-m-l/angular-bootstrap-slider,kranthitech/angular-bootstrap-slider,SamGraber/angular-bootstrap-slider,hristozov/angular-bootstrap-slider,SamGraber/angular-bootstrap-slider,seiyria/angular-bootstrap-slider