Put named graphs work

[jmatsushita]

I've implemented storing named graphs. @BigBlueHat It would be awesome if you tried it out in the playground!

[BigBlueHat]

Great work @jmatsushita!

I've got it backed into a branch atm:
https://rawgit.com/WileyLabs/levelgraph-playground/test-named-graphs/index.html

Still got some things to tweak on master wrt to s/preserve/overwrite changes. Soon. 🕔

[BigBlueHat]

Oh! And forgot to mention. The playground's moved...I'll update the README links. It's here now: https://github.com/WileyLabs/levelgraph-playground

[BigBlueHat]

@jmatsushita you still around? 😄 Would love to see this one merged, and to collaborate on a similar thing for levelgraph-n3 if you've got cycles/interest.

I'm working on mixing it with @pouchdb (btw) and hope to explore the hexastore concept as coupled with a JSON(-LD) store. Makes my brain happy. Or maybe that's the ☕️. Probably both.

[BigBlueHat]

@jmatsushita I'm planning to make this branch the new foundation for the playground--someone speculatively... Here's the current iteration: https://rawgit.com/WileyLabs/levelgraph-playground/test-named-graphs/index.html

What else needs to be done for testing? I would love to eventually bring levelgraph-n3 up to speed with these also...but my time's focused elsewhere atm.

Let me know how I can help "seal the deal" on this one. 😄

[aredridel]

If you want to rebase this I'd love to take a look at it.