Add README.osx for instructions on installing on OSX using Homebrew

README.osx

@@ -0,0 +1,14 @@
+# Homebrew on OSX
+
+If you develop on OS X (Mavericks, Mountain Lion, Lion, Snow Leopard), the
+Yaws formula works correctly for users of Erlang/OTP R16B01 and above. To
+install please run:
+
+    brew install yaws
+
+To install the HEAD using Homebrew run:
+
+    brew install --HEAD yaws
+
+This capability was made to work correctly with [this pull request
+merge](https://github.com/mxcl/homebrew/pull/23076).