Time logging.
Set -> Map for residents and blocks.
Timers
HashMaps instead of HashSets for data in MyTownDatasource

Option to allow claiming only chunks adjacent to existing ones
Fixes to adjacent-only chunk claiming.
1.5.1.9f

Fixed 'name already in use' errors for towns and nations.
Merge pull request #3 from Torins/master

Changes in mytown 1.5.2