Added bower support

Added bower.json for bower support, after merge a [semver](http://semver.org/) tag (v0.0.1) needs to be added, so that bower can properly register the package.
After that this command needs to be ran:

    bower register deb.js git://github.com/krasimir/deb.js.git

I guess since you're the author you should have the honor :wink: 
(If again you don't want to bother, I'll do it)