Fancy Overview Info

Hi, 

I'm trying to acquaint myself with the codebase so I can see if it's possible to use libvirt through unix sockets, and if so, enable it. I think it is, and looks to be fairly easy, as long as the socket file is chowned/modded appropriately.

In the meantime, while experimenting, I swapped out the static percentages for CPU and Memory, for some auto-updating bootstrap progress bars.

It's currently set to update once every 2 seconds, but that can be changed on line 129 of templates/overview.html

It's only a small tweak, and you may not like it, but I thought I'd post it up anyway :)

/Kieran