initial check-in of datacube.py
initial check-in of datacube.py

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