Adds Bitter Shandy and renames Snow White to Shandy

I literally have no idea what a "Snow White" is and neither does Google, and I've even worked behind a bar for a time, so renamed the beer+lemon-lime drink to its most obvious equivalent, a shandy.

Also added a bitter shandy, ale+lemon-lime.

These snowflake reagents are something, huh?

![](http://i.imgur.com/FVS2B6w.png)