Breaking API change landing for 2.0-beta10

[Tim Penhey]

Hi folks,

This impacts all people calling the Juju API directly. If you use the 
juju client, you *should* be fine.

Taking advantage of our time in "beta", we are adding consistency to the 
wire-protocol used by the juju client to talk to the juju apiserver.

In general this means that all the parameters are lower-case with words 
separated with dashes. *Error returns should all be "omitempty" meaning 
that if there was no error, there is no "error" entry in the return.

There is no API facade version bump with this change. This allows us to 
start 2.0 with a clean and consistent slate.

The change can be found here:
	https://github.com/juju/juju/pull/5674

This change will be landing very soon, perhaps by the time you read this 
message.

Cheers,
Tim