Refactoring, Townrun Fix, Destructible LOS, Misc.

Refactor:
Moved Behaviors/Navigation Contents into Cache/Navigation.
Moved Player Class Folder from BotCache into Cache.

Townrun Check -- TimeLastCheckedForTownRun is now DateTime.Today,
instead of DateTime.Now. Should fix issue with townrun not starting on
new game.

Demonhunter Impale will now check CanCast on preconditions.

New Settings for Level One characters will disable Grouping, Fleeing,
and Cluster Behaviors by default.