Merge pull request #39 from bf4/update-gemfile_lock

Update gemfile.lock per Gemfile gem source
Merge pull request #40 from bf4/rename-initializer

Rename initializer to have a better name
Cast tweet_id to string for db query
Allow optionally importing tweets without media
Handle saving and displaying tweets without media
Link to tweet status
Fix reference to old constant
Merge pull request #38 from bf4/db-casting-fix

Cast tweet_id to string for db query
Merge pull request #41 from bf4/import-tweets-without-media

Optionally import tweets without media
Merge pull request #42 from bf4/link-to-tweet-status

Link to tweet status
Merge pull request #45 from bf4/fix-bad-constant

Fix bad constant
Merge branch 'heroku'