clean up schemas

[gtsueng]

Updated outbreak.info schemas. Changes include:

• Removal of marginality from property definitions as DDE handles marginality only in the class validation
• CitationObject its own class
• CitationObject property 'type' changed to sourceType
• Inclusion of re-usable evaluation property, for adding assessments on quality of a resource
• Inclusion of schema:Review, schema:Rating, schema:AggregateRating object in validation
• Creation of validation for subclasses such as ArmGroup, Person, Organization, etc.
• Protocol.status changed to Protocol.protocolStatus
• Product.type changed to Product.category
• Addition of Information Sciences to topicCategories