Use bower for dependencies. Added dotfiles/package files. Fixes #9

This PR should bring everything up to date w/ yeoman 1.0 beta & ember rc2.

* Updated component.json for jquery 1.9.1, handlebars rc3, ember rc2
* Use index.js to include dependencies in components.js block
* Use index.js to include app.js in main.js block
* Files generate into an /app/ directory like other generators/ember-tools
* Included dotfiles and package.json that were already in the templates dir
* Updated readme to include `bower install` step
* Updated tests to check for new files