Editor overhaul:
Added editor modes that determine what happens when the left mouse button is pressed, dragged or released.
Added rotating of custom maze objects.
New format for maze: current maze unusable: new mazes must me made.
Added possibility for editboxmanager to switch between different menus (not implemented yet).
Merge branch 'master' of https://github.com/EWI3620TU-GROUP06/EWI3620TU-GROUP06

Resolved merge conflicts.