Resolve "Write documentation"

Closes #2

See merge request !18

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

Merge branch '2-write-documentation' of https://gitlab.stud.idi.ntnu.no/IT2810-H19/teams/team-43/project-2 into 2-write-documentation

From master into 2-write-documentation

See merge request !17

Resolve "Use sessionStorage for caching svg and text"

Closes #16

See merge request !16