storm-lib 9.00a (new formula)

[StormLib](http://www.zezula.net/en/mpq/stormlib.html) is a library for interacting with Blizzard's [MPQ](http://en.wikipedia.org/wiki/MPQ) game archives.

Bundling or creating an MPQ for testing seemed out of scope for Homebrew, so it solely attempts to verify the library installed correctly by extracting the version number.

Moved this to `homebrew-games` as Adam kindly [suggested](https://github.com/Homebrew/homebrew/pull/28371).