Updated NPM packages to match 'npm prune'
Updated NPM packages to match 'npm prune'

- package.json - Added the following packages to the devDependencies
  for drywall development. These include:

  * sequelize-fixtures - Used to create fixture files that will be
    used to seed the database initially

  * sinon - Spies, stubs and mocks for drywall app. Used in testing

  * supertest - HTTP Testing library for JavaScript apps

trystant/drywall,trystant/drywall,trystant/drywall