Small changed

Fixed small issues, changed method of calling the file (heuristic
defaults to simple, numPlayers defaults to that in file).  Needs more
fleshing out in future to handle input, add heuristics.    Heuristics
suggestions for investigation:
1) # trees between the current person and the previously placed person
2) # trees in "line of sight" of a given location
3) # trees are within a given area surrounding a person.