Restructure developer parts
Make emphase on "github fork" step
add pep_project
Add git workflow
make publish create pages in "public-pages" instead of "gh-pages" (avoid branch conflicts)
Fix broken links
Fix broken links (2)
Fix git-workflow (rebase do not work as expected)
fix copyright, move openalealab doc to 'latest' dicrectory
fix copyright, move openalealab doc to 'latest' dicrectory