BUG: Mouse wheel zoom did not respect domain_limits if the orientation of the axis was reversed.
BUG: Mouse wheel zoom did not respect domain_limits if the orientation of the axis was reversed.

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