Feature/mie 1337 require.js build changes to remove hardcoded id

Separates the require.js's configuration (now lives in config.coffee) from the initialization (main.coffee) of the module in order to remove the user's hardcoded id from the build file. We also added 'ActivityStream' as a separated module.

The example instanciation of this module was moved to app/index.html

I'm not sure we should lock ourselves on the index.html to a specific user... rather the page should wait for a ready command, and functional tests could choose what to use in this regard. We should probably also add fixtures to the service so we can have a 'base' for tests...