Add bower.json for publishing

Sorry about the diffs on the README.md, Sublime is auto removing trailing spaces. If accepted, you can publish with bower register jsondiffpatch https://github.com/benjamine/JsonDiffPatch

I accidentally published one to jsondiffpatch on the registry, have submitted a request to have that one removed to make way for yours. Once added, new versions are automatically available via SemVer tags on GitHub that you are already doing.