Batch calls not implemented

[dracc]

Since there's an assertion for the first char of the request to be {, batch calls can't be made.

A batch call is an array of requests. JSON arrays start with [, thus the assertion is hit.

Edit: Sorry, just noticed that it already says so right in the readme. Not less of an issue though.

[joncol]

Thanks for the bug report. I'm curious what use case you have for batch requests. If I find the time I might take a stab at implementing them.