Moved source pathfinder_sociery_field_guide to campaign_setting folder

The source Pathfinder Society Field Guide is a Campaign Setting usable
by all Pathfinder games. It is designed to be used by any Pathfinder
game, not just PFS Organized play.
Added KEY tags because CAMPAIGN tags with commas can't be used in PRECAMPAIGN
Inner Sea Bestiary is a Campaign Setting
Merge pull request #66 from mjmeans/pfs

Some minor corrections to Pathfinder Campaign Setting sources