included add config and show config features

Hi @pst,
Add config and Show Config features added
One issue with implementing the remove config was, passing the variables seem to be a challenge.

In https://github.com/cloudControl/cctrl/blob/master/cctrl/app.py#L740 ,
args.variables expects to be an array (i think) as defined in
https://github.com/cloudControl/cctrl/blob/5fcdca83fc6fb26676b1ff3aa4f241663aa400de/cctrl/addonoptionhelpers.py#L69
getting an array of the keys to the delete http request is quite a challenge.
This is my first encounter with python so i guess my assumptions are quite right.
Cheers