Adding Brawler and Swashbuckler support

Adding Brawler and Swashbuckler support in a way that doesn't require a variable defined in the ACG. 

Changes:
- Every 13 INT requirement now allows for a variant variable requirement. Also the three odd 3 INT requirements allow for a similar requirement.
- Every Monk level requirement allows for a variant variable requirement. This is to support Brawlers' abilities to qualify as Monks for feats.