Moved brew-formulas.txt to Brewfile

http://robots.thoughtbot.com/brewfile-a-gemfile-but-for-homebrew

Brewfile

+# Run `brew bundle` to automatically install these packages
+# http://robots.thoughtbot.com/brewfile-a-gemfile-but-for-homebrew
+
+install readline
+install sqlite
+install gdbm
+install pkg-config
+install gfortran
+install python
+install yuicompressor
+install node
+install graphviz
+install mysql
+install geos
+install mongodb
+install lynx
+install libjpeg
+install libtiff

requirements/system/mac_os_x/brew-formulas.txt

-readline
-sqlite
-gdbm
-pkg-config
-gfortran
-python
-yuicompressor
-node
-graphviz
-mysql
-geos
-mongodb
-lynx
-libjpeg
-libtiff