Add a server list to the landing page

As per ticket #456, this update allows you to manage a list of frequently used servers on the front page. I have done a little testing on Chrome/Firefox, but I do not currently have access to Safari. 

Two potential problems:

 1. Firefox (23.0.1, windows) does not save the server list, but I'm 90% sure that's unrelated to my changes, as stuff like notification options do not appear to persist between sessions, either. I do not know if Firefox even supports persistent local storage, of it there's a browser setting I've missed?
 2. The select is a little ugly in Firefox, as there's no gecko equivalent of ::-webkit-scrollbar. I figured making it pretty should be a separate issue.

Other than that, it seems to be working well! I hope the code is up to snuff, and there aren't any unintended consequences.

![final](https://f.cloud.github.com/assets/1489178/1054571/953d6f8e-110c-11e3-92d8-fe0028bbae0c.PNG)