web: add descriptions, sources and licenses to all shell scripts
remove old scripts and add descriptions/license/sources
utility: update scripts headers
web: add facebook-poster.py (get bookmarks tag from a netscape-style bookmarks.html export (Delicious, Shaarli...) and post them to Facebook.)
web: add youtube-music-upload.py (Upload an mp3 file to youtube, using cover.jpg as still video image)
add git/submodules-generate-readme.py (generate a README.md file with links to each git submodule in a directory)
add dev/markdown-describe-scripts.sh (Generate a markdown-formatted list of all scripts in a directory, along with their descriptions)