Update tests and docs

[Djailla]

As Python 3.4 is end of life since 2019-03-18
https://www.python.org/downloads/release/python-3410/

Remove compat :

• update setup.py
• update docs
• update tox / travis / appveyor
• update tests with real examples

[ryanhiebert]

Thank you for working on this @Djailla ! The project is better for the work you've put into it already.

Just looking here it doesn't seem like tox has removed its support for Python 3.4. This is a minor integration project, so I don't want to be the one breaking builds. I'll leave that for tox or Travis. As long as it works from them, it should work here.

I don't have any issue with updating the docs, but I don't want to drop support for Python 3.4.

[codecov-io]

Codecov Report

Merging #142 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #142   +/-   ##
=======================================
  Coverage   86.85%   86.85%           
=======================================
  Files           5        5           
  Lines         213      213           
  Branches       48       48           
=======================================
  Hits          185      185           
  Misses         21       21           
  Partials        7        7

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[Djailla]

@ryanhiebert done

[ryanhiebert]

Looks pretty good, thanks for the work you're putting into this. Sorry for being so nitpicky. If you don't have time to get around to it, I'll clean it up when I find some time.