Some scripts in Morrowland fail to work

Morrowland has a few scripts that fail because the authors seem to have expected PositionCell to take posX posY posZ rotX rotY rotZ cell arguments instead of posX posY posZ rotZ cell. This works in the original engine because of the behaviour described in #2407 (closed). OpenMW currently doesn't allow this many additional junk arguments for the function, however.

More importantly, the mod replaces the levelling system with an experience-based system. The script that controls levelling up uses an unquoted integer variable name - something that is allowed in unambiguous contexts.

It also suffers from #4996 but that's neither here nor there.