Feature/compositive to npm module

This change should allow me to be able to use this github repo as a NPM module.
By moving these three 'devDependencies' to 'dependencies' NPM will now install Compositive's dependencies correctly. Allowing me to run 'npm install' from a project using Compositive and still be able to run 'node server.coffee'. It basically will out of the box with other projects.

This is particularly useful for deploying to Heroku, since Heroku will run 'npm install' to get all of your projects dependencies. Prior to these changes my app couldn't be deployed correctly since the dependencies for Compositive were not being installed. :)