Adding exam points criteria

Klausuren/Sda1/2016Summer/Solution/criteria.txt

+2p Schema was tested against database
+
+1p Entity Person:
+2p id person (not null,unique) or primary key
+2p Required attribute birthYear, name
+
+1p Entity Movie:
+3p required foreign key "director" to person
+2p Required attributes rating, title, year
+
+1p Relation Person <--> Movie:
+2p Required foreign keys id and ref in actor
+2p (id, ref) unique within actor 
+2p optional isStar Attribute
+