P0-B3: Part 1138: Story

It is now possible to place AI crew members during dynamic and static story missions.

I have also added basic support for the player to find or recruit crew members in the field, and have them added to the players ship.

This will be a much more extensive feature in the future, I have just added a very basic implementation of it for the moment.

I have also made improvements to the story system, and added more support functions and features that will make creating both static and dynamic stories easier.