Updated bower.json using GWC/google-sheets as a model.
Tweaks to account for the doc-viewer in Polymer 0.4.0.
Merge branch 'polymer-0.4.0-updates'
Merge branch 'master' of https://github.com/GoogleWebComponents/google-youtube

Conflicts:
	bower.json
Merge pull request #7 from GoogleWebComponents/polymer-0.4.0-updates

Polymer 0.4.0 updates