Create initial architecture documentation

Questions that should be answered:

How should the back end be structured?
- How do we enforce certain security guarantees (only user X can access page Y)
- How and when is data loaded from the database? How centralized is access to the database?
What are the basic objects in the database and their relations?
- Create some sort of entity relationship diagram (e.g. an ER-diagram or a UML class-diagram)

Tateology / kaeru