[typo] processing_daemon not processing_deamon
[enh] Documentation + fasten *Leaf.childrens()
[fix] processing_deamon now uses whiteboard except for parent id
[fix] Adapting to the fixed Leaf object
[enh] Extending the graphviz command with more colors
Merge branch 'master' of https://github.com/C4ptainCrunch/beta402
[fix] Adapting document viewer to WhiteBoard arch
[fix] A course shows its documents
[fix] Adapting document viewer initialisation
[enh] decreasing global font size