Actor:canSee correctly calculates and uses the correct chance to see when the...

Actor:canSee correctly calculates and uses the correct chance to see when the target has both Stealth and Invisibility.
ESP only helps seeing actors, not traps, etc.

Actors get a chance to detect traps when they are placed.

Game:logVisible does a better job at determining when non-actors are identified by the Player in log messages.  Updated the comments for the log management functions.

Actor's combat.talented field is set to "disarmed" by default.