These are homebrew formulas for packages that I want to install, but which aren't
in the main repository. I used to install these into ~/opt/local but I find it
easier to let homebrew manage the installation and removal of those packages.
To install them, brew tap ludwig/misc and then brew install <formula>.
If there is a formula conflict, you can brew install ludwig/misc/<formula>.
You can also install via URL:
brew install https://github.com/ludwig/homebrew-misc/commits/master/<formula>.rb