VERSION: Increment to 11.18
CHANGE: Removed debug message relating to initialising binary heaps, as these were created far too often such that log files would become filled with these and little else.
Trivial commit
Merge branch '11.x' into 12.x

Conflicts:
	simversion.h
Merge branch '12.x' into devel-new
Merge branch 'devel-new' into 112.5-merge
CHANGE: Treat different steepnesses of slope differently for the purpose of physics and routefinding.