Revision history for TPath

0.004     2014-03-17 12:58:05-04:00 America/New_York
  * re-use empty list for all terminals to save some memory

0.003     2014-03-17 10:03:44-04:00 America/New_York
  * Some micro-optimizations and simplifications of little functional impart.
    The cache might use a bit less memory now as the keys are shorter.

0.002     2014-03-16 20:43:25-04:00 America/New_York
  * convert words to integers (further) to improve memory use

0.001     2014-03-16 17:18:00-04:00 America/New_York
  * initial release