Help get your codebase back to something that works. 

The changes in this pull request fix up some wonky migrations. It restores a migration that was deleted by accident (see 22dec7d), and changes a CREATE TABLE migration into an ALTER TABLE migration now that table already exists. 

After this, you should be able to perform a 'rake db:create; rake db:migrate' in a new checkout and have all your migrations apply cleanly. 

This doesn't guarantee that your project now works! :) There may still be typos, other problems, etc.