Fix broken favorite icon
Merge branch 'favorite-fix' of https://github.com/Polymer/polymer-tutorial into update-0.3.5
Update components to 0.3.5; remove unused components.
Use color property for default icon color, too.
Remove obsolete touch-action attribute. Should not be required in 0.3.5.
Tutorial cleanup & editorial suggestions.
Update components to 0.4.0.
Merge pull request #26 from Polymer/update-0.3.5

Update components to 0.4.0.