Support newStub instead of newBlockingStub

Posted by gfsilva92:

I would like to be able to initialize a dgraph client without using the blockingStub, like this:

DgraphStub blockingStub = DgraphGrpc.newStub(channel);

At the moment is not possible. But I think it could be a nice improvement on your tool.

Thanks,
Gonçalo.

gfsilva92 commented :

I saw this is already being taken in issue #15