Added different types of beer.

Since there are several types of wine and booze, I thought it appropriate to have a small selection of different beers available as well. The new types are much less common than the good old "beer", but have a slightly higher 'fun' value.

Also, this is my first pull request so I hope it works out. And I think the various values (for rarity, fun, quench, etc) are good, but let me know if I should change something! For the descriptions, I tried to make them brief and descriptive, but feel free to suggest changes.