DATA-1212
Some monsters don't get their racial spellcasting properly
- Add the Base Casting Class we'll use.

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@21004 ef53c05b-3124-4d59-ae7d-fe3273f42be7

https://github.com/pcgen/pcgen/commit/42f1bad