Increase use of addNeighboursCoords in Simulation
tiny cleanup in main.cpp
printHistory is optional now
Cosmetic changes in Printing functions
free History object before program close
Coords debug functions.
addNeighboursCoords() works with 2-level neighs.
Move File* stlog ---> main.h
fixup! addNeighboursCoords() works with 2-level neighs.
fixup! Move File* stlog ---> main.h