cleanup and add a readme

hopes-and-dreams/README.md

hopes-and-dreams/anke.md

hopes-and-dreams/martin.md

hopes-and-dreams/patrick.md

projects/Henrik/Feeling the Past/README.md

projects/Henrik/Feeling the Past/session-7.md

projects/Henrik/Linux Journey/README.md

projects/Henrik/Linux Journey/journey_henrik.md

projects/Maryam & Manuel/README.md

projects/Patrick/README.md

projects/Ricardo/README.md