Fix linker error with most recent aws-c-common

aws_byte_buf_append_and_update is now implemented in common, so don't redefine it.

request with headers

Don't fire on_body for empty chunks of data. (#163)

This was leading to the python crt passing None to the on_body callback instead of byte buffer. Seems simpler to nip this complexity at the source.

aws_http_headers

Improved API for accessing headers.

Memory tracing updates

v0.4.13

Fixed tests to match tracer API updates (#160)

Memory tracing updates

Reworked fuzzer to use mem tracer (#159)

* Rewrote fuzzer to use mem tracer

Respect Content-Length

Content-Length is the boss (#158)

* Content-Length is the boss
- Don't freak out if body stream is set when Content-Length is 0.
  - aws-crt-java unit tests were doing this.
- Obey Content-Length when sending body, rather than trusting end-of-stream.

Connection: close header support

Respond to "Connection: close" header (#157)

Presence of request or response with "Connection: close" header will make that the final stream before the connection shuts down.

fix shared lib build, code clean up

Fixed missing exports of h1 connection. (#156)

* Fixed missing exports of h1 connection.

Fixed content-length=0 being treated as illegal for bodyless messages.

v0.4.8

Fixed error condition for when content-length=0 is set on a response …

Integration tests support aws-crt-python

v0.4.7

changes to support testing aws-crt-python/elasticurl.py (#148)