Add hdf5plugin to MacOS installation requirements.

Update README.

Make sure we enter loop.

Generate the same file as in third-party/fisx/python/cython/_fisx.cpp

Add the third-party fisx stuff.

Workaround licensecheck issue not recognizing license when more than …

…two spaces follow the line comment character.

Force the helper to use the PyMca files.

Update changelog.

Merge branch 'master' of https://github.com/vasole/pymca

Correct old bug shown by tests.