Ux work

Various bits of UX work:

* reference the bootstrap-theme.css style sheet (in addition to the bootstrap.css one)
* remove the theme pulldown switcher
* add a hotdog button menu on the right
* put the theme switcher in there, as well as an update check and an about box
* added a new (placeholder) icon for the chrome app

![screen shot 2013-11-05 at 10 18 01 pm](https://f.cloud.github.com/assets/1269969/1480421/495e80f6-46ab-11e3-8228-2e7bba10f3ab.png)

@keertip @dinhviethoa