Fix syntax error in enroll-approval helper

I guess this depends on the hash syntax and ruby versions, because
in localhost rails didn't complain. This bug was noted until
deploying to heroku.
Fix routing error for enrollment authorizations
Campaign has many tweets

- A scheduled date is not need to create a tweet
- Tweets will be remove when campaign is destroyed
- No orphan tweets
Only an agency may see a list of campaign tweets
Agencies may create tweets for their campaigns
A table to manage tweets
Adds tweeted_at to Tweet Factory
Thou shall edit thy tweets
Fixes selenium bug with FF 23 on OS X

http://stackoverflow.com/questions/18114544/seleniumwebdrivererrorjavascripterror-waiting-for-evaluate-js-load-failed
Thou shall deleth thy tweets
Merge pull request #17 from Intngbl/tweets

Tweets