Add option allowAutoAssignPersonnel

Probably best used by forgetful or lazier players.  Micromanagers would not be interested in this.

Scientists and engineers are put to work on ongoing projects/productions
as soon as they arrive on base.  No more lost productivity.

Soldiers are assigned to craft with free space when they recover from
wounds; arrive at a base; survive a base defense or a craft returns from
a mission. Rookies are placed at the front of the craft (In chess, the pawns go first).
Saves on clicks.