README fixes for clairity
README fixes for clairity

Shyp/heroku-buildpack-pgbouncer,heroku/heroku-buildpack-pgbouncer,Yobota/heroku-buildpack-pgbouncer,rmoorman/heroku-buildpack-pgbouncer,realtymaps/heroku-buildpack-pgbouncer,BetterWorks/heroku-buildpack-pgbouncer,agriffis/heroku-buildpack-pgbouncer