Revert "Removed vestigial ref keyword for Baddie/Map interaction"

This reverts commit afddf628c429b7e95c89bda4dd9ac736a892c13d.
Modifying tiles a bit to add stains
Getting ready to put stains in in place of map grid colors
Getting ready for proper stains
Fleshed out TileStain a bit
Merge branch 'master' into add-nunit
Added basic creation tests for TileStain