* commit '6508d41c':
  added negative acks

* commit 'b84f5e3b':
  modify changelog
  implement resending data
  added inprocess collection

* commit '9d910baa':
  fix query images

* commit '1a36ff9c':
  update changelog, fix fluentd pattern
  update orchestration, fix retrieve data in python lib

* commit '6abf309f':
  update changelog, fix fluentd pattern
  update orchestration, fix retrieve data in python lib

* commit '26660b46':
  fix win test
  update changelog
  update tests
  get file size

Merge pull request #101 in ASAPO/asapo from feature_ASAPO-113-consumer-retrieve-with-unknown-size to develop

* commit '6d3b878c':
  fix win test
  update changelog
  update tests
  get file size

* commit '29da75bf':
  Merge pull request #99 in ASAPO/asapo from feature_ASAPO-112-allow-arbitrary-group-id to develop

Squashed commit of the following:

commit 5383b541ac08e62782769bf82ee19fb128139fb2
Author: Sergey Yakubov <sergey.yakubov@desy.de>
Date:   Tue Jun 30 01:52:41 2020 +0200

    change timeout

commit 3b8be6cd51a3b6ee4aadce144fe47037bd3bcd35
Author: Sergey Yakubov <sergey.yakubov@desy.de>
Date:   Tue Jun 30 00:12:54 2020 +0200

    allow arbitrary group id

* commit 'd7f36aaa':
  upadte changelog
  fix test
  producer retrieves stream info
  start providing last id via producer
  fix using non-positive ids
  refactor, add integration tests
  refactor, implement last_ack_id
  return nacks
  update hasicorp pack to latest versions
  implement ack function
  started working at acks
  refactor
  create position pointer if not exist on each get_next request
  update changelog
  refactor broker, added substream to callback, updated docs
  remove checking stream exists
  add quick start c++ examples
  change layout for c++ docs

* commit 'bee88c9b':
  fix test
  producer retrieves stream info
  start providing last id via producer
  fix using non-positive ids
  refactor, add integration tests
  refactor, implement last_ack_id
  return nacks
  update hasicorp pack to latest versions
  implement ack function
  started working at acks
  refactor
  create position pointer if not exist on each get_next request

* commit '40741c0a':
  update changelog
  refactor broker, added substream to callback, updated docs
  remove checking stream exists