Added a simple service for sharing among controllers.
Added a few more factory services.
Removed extraneous comments.
Updated package.json, and seeding the database is now optional and not the default  using 'node app.js seed-db'.
Explicit naming of mongoDB collection.
Parameterized the seeding of the database; added support for removing pre-existing documents in the 'projects' collection.
Simplified adding new project documents.
Added instructions for dropping and adding new random mongo data.
Just edits.