Add network commands to manage validator profile

[lumtis]

The Ignite Chain has a profile module containing meta-information about the coordinator and validator.

We should offer commands to manage validator profile

ignite n validator show [address]
ignite n validator set details "Ignite Validator"
ignite n validator set identity [keybase ID]
...

[lumtis]

We could also add as part of the ignite n request list output, info about validator if it exist

Id 	Status 		Type 			Content			Info
1 	PENDING 	Add Genesis Account 	[...]
2 	PENDING 	Add Genesis Validator 	[...]			Ignite Validator