Improve installation on CPython when bundling within a collection of packages

[amotl]

trafficstars

Dear Jean-Christophe,

we've made some adjustments to the setup.py file, mainly in order to improve package discovery. Also, we improved the version and long_description attributes and the list of trove classifiers.

The background of all that is that we are aiming to improve the packaging for our Terkin Datalogger.

With kind regards, Andreas.

[amotl]

The background - and to be more specific - about this is that was crucial for us to have the __init__.py files also within the subdirectories libs and mods.

By doing that, MicroWebSrv2 installs well on a regular CPython, even when being bundled within a collection of packages like the terkin-micropython-libraries Wheel, which doesn't include a dedicated setup.py.