Create requireLib path for require.js

- The requireLib path allows you to include require.js in your r.js bundles (http://requirejs.org/docs/optimization.html#onejs)
- Fixes https://github.com/yeoman/grunt-bower-requirejs/issues/34
- Fixes https://github.com/jrburke/requirejs/issues/801
- Added some new lines to improve legibility of console output