improving deprecation comment in chaco2 __init__.py
improving deprecation comment in chaco2 __init__.py

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