Added a component.json file for Twitter's Bower package manager.

See [https://github.com/twitter/bower#defining-a-package](Defining a
package) for more information about how the file was generated.
Changed component.json to bower.json per Bower 0.9.0 update.
Merge pull request #489 from DevinClark/bower-update

Added a component.json file for Twitter's Bower package manager.