Contribution from ESRF

[rafaelcelestre]

As part of the ViNYL project.

adding srwlib to init.py
fix srwpy packaging + remove versioneer
Rework srwpy to vinyl_srw
bug fix on imports for srwlib
adding windows build
adding dependencies verification before build

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Description form @srio (see mrakitin#1):

Now the package is installable:

pip install vinyl_srw

Right now the imports should be:
from vinyl_srw.srwlib import *

Change the calls and directory vinyl_srw to just srwpy to get the imports:

from srwpy.srwlib import *

This is the standard way to import in python. All modules must have the same root. It is not good to have different modules at the main level, like the present situation
from srwlib import *
from uti_math import *