Support FKs to non-int PK entities
Support FKs to non-int PK entities

gbwey/persistent,plow-technologies/persistent,bitemyapp/persistent,naushadh/persistent,pseudonom/persistent,pseudonom/persistent,erikd/persistent,rdnetto/persistent,yesodweb/persistent,psibi/persistent,gbwey/persistent,rdnetto/persistent,gbwey/persistent,paul-rouse/persistent,creichert/persistent