9 Aug 2018: backported 1.9.x fixes to facilitate re-installations

-((announcement refers to end-of-line co2mpas-1.7.x - no need to upgrade))-

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Changes since v1.7.4.post3

Pinned co2mpas dependencies to improve reproducibility...

when installing it in a newer AIO (forthmocing v1.9.x):
ATTENTION:
upgrading/downgrading co2mpas between major-releases renders the AIO unsuitable for "official" purposes - it can be used though for engineering studies.

Transitive dependencies are now served from 2 places:

• file setup.py: contains bounded dependency versions to ensure proper
  functioning, but not reproducibility.

  These bounded versions apply when installing from PyPi with command
  pip instal co2mpas==1.7.4.post2; then :command:pip will install
  dependencies with as few as possible transitive re-installations.

• file requirements/exe.pip & file requirements/install_conda_reqs.sh:
  contain the pinned versions of all calculation-important dependent libraries
  (see :gh:463).

  You need to get the sources (e.g. git-clone the repo) to access this file,
  and then run the command pip install -r <git-repo>/requirements/exe.pip.

Other fixes:

• Support pip >= 10+ (fixes :ghp:26).
• Fix conflicting dill requirement.
• Fix piping dice-commands to stdout.
• No model changes.