definitions, so let's move it so that it's just next to the
functions it relates to. This also opens the way for me to add more
booleans next to other functions without getting confused as to
which is which.
[originally from svn r5723]
introduce a sensible game ID notation for orientable games, and
finally (*blush*) turn the orientability triangles back the right
way up.
[originally from svn r5718]