[PATCH v5] routines to generate JSON data

From: Jeff Hostetler <jeffhost@microsoft.com>

This is version 5 of my JSON data format routines.

This version address the uint64_t vs intmax_t formatting issues that were discussed on the mailing list. I removed the jw_*_int() and jw_*_uint64() routines and replaced them with a single jw_*_intmax() routine.

Also added a jw_release() routine similar to strbuf_release() and fixed the indentation of sub-array when pretty printing is enabled.

The following PR includes my WIP telemetry changes that build upon the json-writer routines and demonstrates how they might be used. The first commit in this PR is this patch.

     https://github.com/jeffhostetler/git/pull/11

Jeff Hostetler (1):
  json_writer: new routines to create data in JSON format

 Makefile                    |   2 +
 json-writer.c               | 394 ++++++++++++++++++++++++++++++
 json-writer.h               |  91 +++++++
 t/helper/test-json-writer.c | 572 ++++++++++++++++++++++++++++++++++++++++++++
 t/t0019-json-writer.sh      | 253 ++++++++++++++++++++
 5 files changed, 1312 insertions(+)
 create mode 100644 json-writer.c
 create mode 100644 json-writer.h
 create mode 100644 t/helper/test-json-writer.c
 create mode 100755 t/t0019-json-writer.sh