Fine-grained entitlements

REMS needed to allow Applicant to apply for permissions to resources that are more fine-grained than the current atomic "resource" (such as, dataset). For instance, applicants want to get access to attributes BMI, sex, age and genotype for those samples where the patient has diagnosis on diabetes and has consented their samples for non-profit research (SELECT bmi, sex, birth-year, genotype FROM dabase WHERE diagnosis=diabetes AND consent=non-profit-research). This needed then to be expressed in the entitlement that REMS produces.