some very small UI ideas

Hi,
thank you all for Rubygems: it's a blessing! :) Below are a few suggestions that I think would help making it a less more user-friendly.

1) Add a way to update all gems to the latest version

2) Give a one line feedback when a gem is being installed (there's an awkward silence once you asked it to install something and before you receive the "Successfully installed XYZ")

3) A new command: "upgrade", just an alias to update (normally I wouldn't suggest this kind of stuff, but it's kind of very rubyish to have synonyms like that and at least one doesn't need to remember which was the command exactly)

4) A new command: "info" or something similar, that will return informations on a gem. Basically something equivalent to "gem list --remote --details GEMNAME" that only work with GEMNAME and not any gems that start with GEMNAME. The rational is that generally one may use "list" or "search" when looking at many gems, maybe looking for something in particular. Hence having a simple, short command to actually get the details would be very useful. Not just that but it would be a little easier for newbies like myself to discover: I checked the command list (gem help commands) and it looked like there was no way to get informations on a gem. It took me a while before I realised I was supposed to use "list --details".

5) If you could provide a couple more informations with "gem list --details" that would be great. In particular it would be nice to get some idea of how popular a gem is, or if it's been abandoned or not. Hence something like "last updated on", etc... would be great.

Thank you all again! It's been a super helpful program!

Diego