added an unstick method
added an unstick method

tofanelli/sticky,nickhudkins/sticky,ConeDeathAPS/sticky,EllieAdam/sticky,garand/sticky,garand/sticky,murilofsouza/sticky,zonayedpca/sticky,srinivashappy/sticky,nickhudkins/sticky,rabbyalone/sticky,codedogfish/jquery-sticky,tofanelli/sticky,Vazgen7788/sticky,rcleozier/sticky,garand/Sticky,iCasa/sticky,HashtagPurvi/sticky,garand/Sticky,alesitalugo/sticky,srinivashappy/sticky,HashtagPurvi/sticky,Vazgen7788/sticky,EllieAdam/sticky,prashen/sticky,alesitalugo/sticky,rcleozier/sticky,EricHodgins/sticky,phanvanthanh/sticky,EricHodgins/sticky,ConeDeathAPS/sticky,zonayedpca/sticky,phanvanthanh/sticky,codedogfish/jquery-sticky,al-v-in/sticky,rabbyalone/sticky,iCasa/sticky,prashen/sticky,al-v-in/sticky,murilofsouza/sticky