Add bower package definition to register

Hi Martin

I want to use your project in my project https://github.com/enzolutions/generator-marionette-drupal, in order to enable to use that your project must be register in http://bower.io. 

To register just add the PR I'm requesting and run inside the folder of you project in your computer the following command.

```
bower register backform git@github.com:AmiliaApp/backform.git
```

In that way your project will be able for any project using bower to standardize library dependencies.

Don't hesitate to asking me anything related to this Pull Request.

Greetings from Costa Rica.