Closes #3 Add a user home page

Adds two routes
 * GET /:username which displays the users projects and a form to add a
   new one
 * POST /:username/add_project which adds another project for that user
Bugs that we'll call features for now:
 * Going to the home page of a user that doesn't exist automatically
   creates that user.
 * There's no duplicate checking when creating a project.
 * Data can be logged for users and projects that don't exist. If that
   user and project are created, the logged data will show up.