Better CI configuration

[Peque]

• Integrate flake8.
• Improve configuration files for CI services.

[codecov[bot]]

Codecov Report

Merging #270 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #270   +/-   ##
=======================================
  Coverage   99.03%   99.03%           
=======================================
  Files          26       26           
  Lines        3532     3532           
  Branches      252      252           
=======================================
  Hits         3498     3498           
  Misses         21       21           
  Partials       13       13

Impacted Files	Coverage Δ
...ain/tests/test_agent_sync_publications_handlers.py	98.27% <100%> (ø)	:arrow_up:
osbrain/tests/test_agent_sync_publications.py	100% <100%> (ø)	:arrow_up:
osbrain/proxy.py	100% <100%> (ø)	:arrow_up:
osbrain/tests/test_agent_ipc_sockets.py	100% <100%> (ø)	:arrow_up:
osbrain/tests/test_bugs.py	100% <100%> (ø)	:arrow_up:
osbrain/tests/test_nameserver.py	98.11% <100%> (ø)	:arrow_up:
osbrain/tests/test_agent_serialization.py	100% <100%> (ø)	:arrow_up:
...sbrain/tests/test_agent_async_requests_handlers.py	96% <100%> (ø)	:arrow_up:
osbrain/tests/test_agent_async_requests.py	100% <100%> (ø)	:arrow_up:
osbrain/tests/test_logging.py	100% <100%> (ø)	:arrow_up:
... and 7 more

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[Peque]

Pushed a fixup to recover colored output in AppVeyor.

[ocaballeror]

Let's see if I understood this correctly. You unified the list of testing dependencies between tox.ini and requirements.txt, and removed tox from it. Now users are supposed to install it manually, hence the modification on .appveyor.yml. Correct?

If that's the case, maybe we should mention it in the documentation, don't you think?

[Peque]

I basically moved all dependencies to setup.py. Just like before there where some docs dependencies declared, now there are some test dependencies declared too. It is a better approach in my opinion. tox is actually not a required dependency for running/passing the tests locally. It is simply very convenient.

I just pushed a commit updating the documentation.