RealmAnnotations + realmQuery.copyToRealmOrUpdate

This is a new class created to keep a hold of annotations from your realmModel|realmObject classes. I came with this solution as I cannot use reflection and figure out annotations of retention class types. How this is implemented can be found on the demo application.

Because now I can track @PrimaryKey, then I can go ahead and also update realmModels. This test can be found in the demo in class QueryTests.java, at method shouldUpdate()