VERSION 2 (Oct. 4 2016):
   No longer require place names to follow one another (i.e. having only
   places 0, 2, 99121 is now authorized). Before this version, if you had place
   2, you had to have both place 0 and 1.
VERSION 3 (Oct. 5 2016):
   You may now have your LeJos conditions and actions directly in the Petri net.
   The use of a translation table is now optional.
   Combining both of the above is allowed.
   Having a translation table entry name after something already in LeJos is no
   longer allowed.
VERSION 3 HOTFIX 1 (Oct. 6 2016):
   Fixes a programming error that made places require a label to be counted.
VERSION 3 HOTFIX 2 (Oct. 6 2016):
   Fixes a regex error that made places require to have a label if they had
   tokens.
   Correcting those two last errors removed the need for an extra place to
   be added.