rww-play features

[almereyda]

I believe @bblfish once mentioned rww-play is also using WebID-RSA now. Am I wrong here?
Additionally, some input about WebID-Delegation would be good to get rid of the N/A in the readme.

[bblfish]

I am using HTTP-Signature as discussed in Issue-52 https://github.com/solid/solid-spec/issues/52
It has had a lot more review I think, and is an actual spec. I'd recommend everyone switch to it, or at least provide for why they should not on that issue.