Fix package

[jbrezmorf]

Primary problem: 'h5py' is missing in package dependencies.

• add this dependency

Secondary problem: lack of whole package testing

• test the whole package with tox using a GitHub workflow, see e.g.
  VISIP tests

Other improvements of setup.py:

• read version from separate file under version control (use also in publish workflow etc.)
• remove KS from authors
• add packages explicitly without "exclude"