Update .gitignore, .gitlab-ci.yml, 1_basic_setup.pct.py,...

Update .gitignore, .gitlab-ci.yml, 1_basic_setup.pct.py, 2_creating_new_versions.pct.py, functions_to_modify_ecoinvent.py, index.rst, LICENSE, README.md, requirements.txt, Code_Documentation_git.pdf, data/IEA variable names.xlsx, data/lci-hydro.xlsx, data/iea-region-topolgy.json, doc/conf.py, doc/functions_to_modify_ecoinvent.rst, doc/getting_started.rst, doc/global.rst, doc/make.bat, doc/Makefile files