state/api: Split to multiple files

state/api: Split to multiple files

To simplify maintenance and development, this
CL splits the API client and server packages
into multiple files. Tests are split as well.

Nothing new introduced, just mechanical.

https://code.launchpad.net/~dimitern/juju-core/045-split-api-multiple-files/+merge/165682

(do not edit description out of merge proposal)

[dimitern, 2013-05-24 18:21:35]

Please take a look.

[rog, 2013-05-24 18:31:12]

On 2013/05/24 18:21:35, dimitern wrote:
> Please take a look.

LGTM trivial

[dimitern, 2013-05-24 19:20:17]

There was a problem with the diff, so I redid the same proposal as a new one,
and merged tip of trunk as well.
The problem was the renamed apiserver.go did not appear correctly, because I
should've done:
bzr mv server.go server_temp.go
bzr mv apiserver.go server.go
bzr mv server_temp.go apiserver.go
(like I did for apiclient.go).

I'm closing this and will carry over the LGTM to the new one (no other changes,
just the above fixed): https://codereview.appspot.com/9742044

Ah, one thing I forgot - as suggested online by Roger, I renamed
apiserver/helpers.go to apiserver/utils.go.