Made it possible to mark tasks as done by swiping them, and removing them by swiping done tasks.
It is now possible to see which tasks are done.
Done tasks are now put on the bottom.
Now logs setDone as modifications.
Merge branch 'feature/marktasksasdone' into develop
Merge branch 'develop' of github.com:villepetersson/DAT255-Grupp12 into develop
Fixed a few null-references.