Add listeners for changes in new tick label properties on an axis which call _invalidate().
Add listeners for changes in new tick label properties on an axis which call _invalidate().


tommy-u/chaco,ContinuumIO/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,ContinuumIO/chaco,tommy-u/chaco,tommy-u/chaco,burnpanck/chaco