Update version to 1.5-SNAPSHOT
Update version to 1.5-SNAPSHOT

hoangsondev/DraggablePanel,murat8505/DraggablePanel,frakc/DraggablePanel,Fiddl3/DraggablePanel,qiwx2012/DraggablePanel,pedrovgs/DraggablePanel,ppamorim/DraggablePanel,FreeDao/DraggablePanel,hmit/DraggablePanel,dfodor/DraggablePanel,Thornith/DraggablePanel,SPBTV/DraggablePanel