Crud interface for redisgraph.js compatible APIs

[davidLeonardi]

@gkorland , I've created a basic CRUD interface for JS clients that expose the .query interface.

Please take a look at https://github.com/davidLeonardi/redisgraphcrud and provide some feedback on the initial implementation.

This is not intended to be contributed as part of this specific package, but rather to complement it.

The basic idea is that it allows for easy creation, retrieval and relating of nodes.

Feedback much appreciated!

Thanks!

[itamarhaber]

@davidLeonardi - LGTM :)