added architecture for usage via -help

[Zandrr]

No description provided.

[lpabon]

Interesting.. I did the following:

$ go run main.go cluster -h
You need a server!
exit status 1

Probably should be able to get help screen without a server being specified.

[lpabon]

Looking for list help prints info help instead:

$ go run main.go -server sadf cluster list -h
cluster info is a command used for getting more information about a cluster.

Usage:

    heketi -server [server] [options] cluster info [args] 

The args are:

    cluster id    The id of the cluster you want to destroy

Example:

    heketi -server http://localhost:8080 cluster info 0854b5f5405cac5280c7dc479cd0e7fb

[lpabon]

Nice:

$ go run main.go -server sadf cluster destro -h
Error: Command not found
exit status 1