Unsubscribe correctly from buffers in packages
Unsubscribe correctly from buffers in packages

Previously namespaces were used to off() when a buffer was
unsubscribed from which affected other views in the same
package also listening to the current buffer.

Now event namespaces are no longer used and instead off() is
called with the callbacks originally registered for the given
event name.

pombredanne/status-bar,ali/status-bar,TShapinsky/status-bar,devoncarew/status-bar,Abdillah/status-bar,mertkahyaoglu/status-bar