spark cloud commands

[kennethlimcp]

This should replace spark core rename and spark core remove with spark cloud rename and spark cloud remove to have a general command for future dev kits like photon

[KarbonDallas]

I'm partial to the device keyword. What do you think?

[kennethlimcp]

sounds much better. I remember the older spark cloud xxxx remained due to backward compatibility with the old syntax used but it's time to remove them ;)

[kennethlimcp]

new implementation is particle device xxxx