First phase of the refactor of admin complete

[Fraser Scott]

Hi all

Branch is now merged into development for both admin and core. Things to note:

* pki.io.go has been renamed to main.go to make it more obvious

* main.go just sets a couple of global variables and then sets up the top level mow.cli command

* The next level commands are in runXXX.go files. These parse the parameters etc and call controller functions. They also set up the "Environment"

* The environment is in environment.go and is used to tracked logging, org controller etc.

* Controllers are in xxxcontroller.go files and do validation then interact with core etc.

Still quite a lot to do (i'll create some tickets for most of it):

* Move controllers to core

* Maybe move the environment to core.. or maybe not. If admin and agent have very different environments, it might make more sense to have individual envs and use an interface

* The mow.cli Action functions could ideally be a bit smarter. There is a lot of repetition of code.

* Logging current sucks. Needs more and stuff is done in the wrong place quite a lot leading to duplication. I was thinking at the start and end of a controller function, then above core commands.

* At the moment the controllers are calling fmt.Printf directly for normal output. They should really just return some data and let the runXXX.go files handle the output to the user.

* Finally, there is still a lot of cleaning up to do. Some stuff has been copy/pasted from the old code, so duplication and doing having functions in the right places.

Getting somewhere though :)

Cheers

[Fraser Scott]

Oh yeah, and most of the validations are missing ;)