Add Procfile / unicorn

Change-Id: I24742485e5b61c8b53c0f2b40cfde77ef84f084e
Reviewed-on: http://gerrit.causes.com/38021
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>
Update gems for heroku

Change-Id: Id8b65dfa7881fc8dbfaa9f9fb8939853c827809f
Reviewed-on: http://gerrit.causes.com/38022
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>