Better documentation for build-time configuration.
Better documentation for build-time configuration.

cloudControl/buildpack-clojure,heroku/heroku-buildpack-clojure,heroku/heroku-buildpack-clojure,nvbn/heroku-buildpack-clojure,cedricpineau/heroku-buildpack-clojure-phantomjs,jkutner/heroku-buildpack-lein,mstine/heroku-buildpack-clojure