Restructure vagrant vcloud-status to vagrant vcloud command for future additions

[tsugliani]

The way the actual vagrant vcloud-status command is a bit limited.

In the future, we are very likely going to implement new commands such as :

• Redeploy Edge Gateway

A little refactoring is needed to make it simple to add new commands.

[tsugliani]

Changed to:

Usage: vagrant vcloud [options]
    -n, --network                    Display the vCloud Director network mapping information
    -s, --status                     Display the vCloud Director objects IDs
    -h, --help                       Print this help

[StefanScherer]

I would suggest to remove the "--" from the keywords. I use some other plugins (vagrant-vbox-snapshot) which does have commands like vagrant snapshot take back (where back is the name of the snapshot), and I often use vagrant snapshot go back to fast reset to the test point.

So, the commands would look like

vagrant vcloud status [-all]
vagrant vcloud network
vagrant vcloud deploy-edge-gateway
...

What do you think?