Minor: Playtest Packet 04B

All I need to know is: did we lose them?

Minor edits. 

Changelog:

• Added a new Trooper optional move "Emergency Ammo Pouch"
  • Designer's note: Troopers should, in general, be the core firepower of any team. This should help with that.
• Changed the core move "Seize the Moment" to be less prescriptive about what you can do with it.
• Added short descriptors to each core move about situations where they might be used, particularly for Seize the Moment and Get Up Close and Personal.