Give a fresh beer after the hard work of brewing

This is a little visual tuning and a bit of fun, too.

 At the beginning of the summary line a :beer: is given out (but only on <del>Mountain</del> **Lion** or above). This acts as a nice visual marker for the end of a (successful) brew-ing process. Helpful, especially when several deps are being brewed. It's also a little bit of branding for Homebrew.

- Name of the brewed formula in "Summary" heading. It was so hard to quickly scan for the name in `homebrew/Cellar/sqlite/3.7.14.1: 9 files, 1,9M, built in 23 seconds`
- Name of the currently brewing formula (or dep) is in green. That makes is possible to scan for the formula names effortlessly. See shots below.

Tested with Terminal.app and all kind of different fonts. Please test with iTerm and what-so-ever your favorite term is.

![sample](https://dl.dropbox.com/u/1713245/moar_beer1.png)
...snip...
![sample](https://dl.dropbox.com/u/1713245/moar_beer2.png)
...snip...
![sample](https://dl.dropbox.com/u/1713245/moar_beer3.png)