Previously config sub commands were manually parsed rather than using
cobra.
Make config command have the following sub commands:
* create Create a new remote with name, type and options.
* delete Delete an existing remote <name>.
* dump Dump the config file as JSON.
* edit Enter an interactive configuration session.
* file Show path of configuration file in use.
* providers List in JSON format all the providers and options.
* show Print (decrypted) config file, or the config for a single remote.
* update Update options in an existing remote.
The following changes were made to existing commands
* listproviders was renamed to providers
* listoptions was removed in favour of providing the output in providers
* jsonconfig was renamed to create
* an optional parameter was added to the show command
