Feature request: More information from 'list' command

[pscs]

I had some weird problems getting Mussels to work, and it would have been useful for problem diagnosis if the 'list -a' (list -a -V') commands gave more information about what Mussels thought was going on.

For instance:

• are cookbooks trusted or not (eg putting 'untrusted' next to untrusted ones would prompt the user that maybe trusting them would be useful)

• which platform Mussels thinks it's currently using, and whether recipes/cookbooks support that platform.