Merge branch 'better-api-generation' into 'master'

build.gradle

src/main/jastadd/Analysis.jrag

src/main/jastadd/DumpTree.jrag

src/main/jastadd/backend/API.jadd

src/main/jastadd/backend/AbstractGrammar.jadd

src/main/jastadd/backend/Backend.jadd

src/main/jastadd/backend/BidirectionalAPI.jadd

src/main/jastadd/backend/DirectedAPI.jadd

src/main/jastadd/backend/LowerBoundCheck.jadd

src/main/jastadd/backend/NameResolution.jadd

src/main/jastadd/backend/PrettyPrinting.jadd

src/main/jastadd/backend/Serializer.jadd

src/test/jastadd/Utils.jadd

src/test/jastadd/relations/Relations.jrag

src/test/jastadd/relations/Relations.relast

src/test/jastadd/serializer-names/Serializer.relast

src/test/jastadd/serializer/Serializer.relast