Adding bower.json to additionalFiles
Adding bower.json to additionalFiles

It works.
```
$ grunt release --no-write
Running "release" task
>> Release dry run.
>> bumped version of bower.json to 0.0.1
>> bumped version of package.json to 0.0.1
>> staged bower.json package.json
>> Committed all files
>> created new git tag: 0.0.1
>> pushed to remote
>> pushed new tag 0.0.1 to remote
>> published version 0.0.1 to npm
```

trickybit/seltzer