reordered initalisation order at src/Generating/Cave.h line 73
moved deafult action into deafult clause at src/Generating/DistortedHeightmap.cpp line 741
Merge remote-tracking branch 'upstream/master'
added abort to DeadlockDetector to generate core dumps on failure
Merge pull request #414 from worktycho/abortondeadlock

add abort call to deadlock detection code