Packaging scripts

[pyx]

Close #73 .

Proof of concept.
No ready to be merged right now

• use 'extras_require' for optional dependencies in setup.py
• CI might fail, 'uvloop' and 'ujson' is truly optional now.
• Makfile
• Easier way to setup development environment
• pytest?

[pyx]

I am using this trick to reduce duplication:

In 'setup.py', list all requirements, including pinned version if necessary.
In requirements files, using what's defined in 'setup.py'.

Example:
setup.py with all dependencies, some with pinned versions.
https://github.com/pyx/hymn/blob/master/setup.py

DRY in requirements files
https://github.com/pyx/hymn/blob/master/requirements/core.txt
Can be as simple as a oneliner: -e .
Using '-e' here because if users install vibora from local repository, chances are, they want it to be editable as well.

This style is opinionated, so I am not pushing this right now.

[frnkvieira]

I like the idea, let's push this forward

[pyx]

Okay, I will see if I can make any progress over weekend.