Implemented some additional functionality to set a display size more comfortably. Also implemented a method to give the system the size of a video wall. It will do the resolution calculation by itself. Needs to be tested a lot before a merge.
Some more commentary, some more testing. Some little fixes.
Some cleanups and tests.
Improved the example and did some ui testing.
Merge branch 'feat_dsteffen_windowSizes' of https://github.com/FUSEEProjectTeam/Fusee into feat_dsteffen_windowSizes
Merge branch 'feat_dsteffen_windowSizes' into develop_lh