LevelGraph and JSONLD

Hi Everyone,

I am new to JSON-LD, but I have just released a small
Object-Document-Mapper based on it:
LevelGraph-JSONLD<https://github.com/mcollina/levelgraph-jsonld>.
It allows to store JSON-LD documents on the
LevelGraph<https://github.com/mcollina/levelgraph>triple store, both
on Node.js and on the Browser.

Any feedback/patch/bug is VERY welcome! :)

Cheers,

Matteo