Modifications to get full marks on week 5 work

[yemregumus]

• [x] Add numbers to mock-ups so we can refer to them in activity diagrams @yemregumus
• [x] Add descriptions to mock-ups so its clear what the mock-up visualizing @yemregumus
• [x] Add more mock-ups that refers to sign up process and views. @okuti2
• [x] Add descriptions to new mock-ups

[yemregumus]

Both done for the existing mockups

[yemregumus]

working on the descriptions and codenaming the mockups visuals

[yemregumus]

added descriptions on new mockups for week 5 and copied changes to current SRS