Configuration for adapter.js registered on Bower

[To register a package in Bower](http://bower.io/docs/creating-packages/#register) don't require any aditional permission since it works mostly as a URL shortener point to git repositories and it can be done by anybody, so I've already register it and it's already available. This file contains the metadata required by the [Bower registry](http://bower.io/search/) so the package can be easily indexable and also only download the required adapter.js file and no other files from this repo.

This fix issue #104.
If it's mandatory, an alternative  would be to add a non-canonical field on the top of the json object with that info so it can be included on the file and the json parser could ignore it, but in json format it's not possible in its current spec to have comments, at least in strict parsers (and Bower, written in Node.js, has one of them...).