Makes initialization happen automatically when using ember-addon

  * move initializers into lib/torii/initializers
  * add copy:appAddOn task that moves initializers into
    app-addon/initiailizers so that ember-cli's loadInitializers can
    auto-load them
  * add copy:vendorAddOn task to move built named amd dist into
    vendor/torii/torii.amd.js. This is a nice namespacing for the
    app.import statement that ember-addon's `included` hook calls
  * modify ember-addon's `included` hook so that it explicitly declares
    the torii module exports that the initializers will need