Merge branch '100_pip_install' into 'dev'

Pipfile

Pipfile.lock

README.md

bin/silkaj

doc/build_with_pyinstaller.md

doc/install_build.md

doc/install_pip.md

doc/install_pipenv.md

doc/release_packages_on_pypi-fr.md

release.sh

requirements.txt

setup.py

silkaj

silkaj/__init__.py

silkaj/auth.py

silkaj/cert.py

silkaj/commands.py

silkaj/constants.py

silkaj/license.py

silkaj/money.py