7 Implementation/sprints

[sebastianvitterso]

• [x] Should probably add some reflection about time estimates and time sheets in the retrospective part in addition to the tables.
• [x] Lese gjennom og gi kommentarer på helheten
• [x] Sprint 3
• [x] Sprint 4
• [x] Update all figures and reflect on them according to comments in LaTex. Has to be done when the backlog is almost finished