0.9.3

Lately I've been hard at work with the Core module, but here are some improvements and fixes in the meantime.

• Rework ammo items to support Custom templates and use with NPCs
• Ammo can now be bought directly from a weapon's item sheet.
• NPCs can now manage their magazine count and optionally use ammo items
• Fix NPC skills formatting and inputs not working
• Add ability for Minor Psychic Powers to define a Discipline to use
• Add enrichment to item sheet editors