Add README

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

README.md

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+Homebrew-games
+==============
+
+How do I install these formulae?
+--------------------------------
+Just `brew tap homebrew/games` and then `brew install <formula>`.
+
+If the formula conflicts with one from mxcl/master or another tap, you can `brew install homebrew/games/<formula>`.
+
+You can also install via URL:
+
+```
+brew install https://raw.github.com/Homebrew/homebrew-games/master/<formula>.rb
+```
+
+Docs
+----
+`brew help`, `man brew`, or the Homebrew [wiki][].
+
+[wiki]:http://wiki.github.com/mxcl/homebrew