Merge pull request #7 from AdrienGiboire/master

Complete README.md with some informations
feat(Heroku): Heroku compatible

Make it work out of the box with the Heroku, even on 1 dyno.
fix(Twitter): Updated Twitter endpoint.
Merge pull request #8 from zaiste/heroku-adapted

Heroku adapted & Twitter Fix
Add `dump.rdb` to `.gitignore`