Repo: Update bower.json along with package.json when updating versions.

This updates `bower.json` along with `package.json`, keeping methods for handling JSON files consistent and unified. It takes care of the most common needs for publishing to bower, which is just to update the version and push a tag.

Also, if we were to decide to add component support at some point, all that needs to be updated is the jsonNames array and documentation.

Ref gh-4.