Update Getting Started guide page "Adding a Route and Template"

Update Getting Started guide page *"Adding a Route and Template"* to remove outdated references to JS libs.

As the libraries are added in the previous page ("Obtaining Ember.js and Dependencies)[1], the references here are unnecessary and also out-of-date (the files downloaded have specific version numbers, i.e. `jquery-1.10.2.min.js`).

[1]: http://emberjs.com/guides/getting-started/obtaining-emberjs-and-dependencies