Database.yml for pg

Hello,

I try to install propile locally with PG to help, here is some issue I have fixed to run spec: 

ZenTest throw error on each rake task like this http://stackoverflow.com/questions/14488605/cant-install-zentest-4-8-4 . I think I can code without this tool, then I removed it. Perhaps not a good idea (but one that can help me to help you ;-).

Change config/database to add host and port. No connexion using my computer without this. This is not a problem for heroku, they don't use this file.

Add dotenv. A gem that help to set environment variables as in production but in a file (easier way to share a default config that used with running code)

Remove some comments in Gemfile (comments are useless)


Hope it's help.