remove crap, erd and architecure diagram

- a bit of cleaning of useless files
- finished ERD diagram
- added architecture diagram
    - added to dossier as well

dossier/uml.md

@@ -17,3 +17,8 @@ UML
 ===
 # Entity Relations
 <!-- include: uml/ERD.md -->
+
+UML
+===
+# Architecture
+<!-- include: uml/architecture.md -->