Decide on how to disambiguate IPLD pathing from IPFS pathing

[Stebalien]

Currently, the IPFS daemon plays it fast-and-loose with pathing and uses the CID (whether or not the object is stored as a protobuf) to decide on whether to path through it as an IPFS directory tree or an IPLD object.

Instead, we may want to consider using a /ipld/... prefix. We definitely should not be disambiguating based on the CID as the object encoding should have no bearing on how we path through it once we've decoded it.

[daviddias]

I feel this Q should go into a discussion on https://github.com/ipld/specs. Nevertheless, I agree with the /ipld pathing, I believe @whyrusleeping does too.

[Stebalien]

Turns out we already have such a discussion: ipld/specs#8