Fixing chaco canvas example so that MULTITOUCH is False by default, since enactable isn't installed by default.
Fixing chaco canvas example so that MULTITOUCH is False by default, since enactable isn't installed by default.

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