Move development documentation to a new file.
Add imports to help PyInstaller detecting dependencies.
Remove scripts to download and pack third-party dependencies.

There scripts are not used any more since all dependencies are installed with pip.
Update dependencies documentation.
Rename file to markdown
Remove setup.py

This file is not used and don't need to be in the source.
Removing it avoids confusion.
Remove thirdparty repository.

Now the modules are installed with pip using the requirements.txt file.
No need for keeping zip files around.
Update project URL.
Update README