A simple utility to remove tweets with an optional time buffer

1. bundle install for dependencies (see Gemfile).
2. You will need access to the Twitter API. If you don't have it already, apply here.
3. Create an app with Twitter here.
4. Take note of your access credentials and set your ENV variables accordingly (see client.rb for reference). You may also hard-code them if you don't plan to commit.
5. Assign USERNAME in delete_em.rb to your Twitter username.
6. Assign DURATION in delete_em.rb to the amount of days of activity you'd like to keep (0 for none).
7. Run ruby feed_cleaner.rb from the lib directory.