Merge branch 'dev/rene' into feature/relast. this required many adaptations.

build.gradle

src/main/jastadd/Analysis.jrag

src/main/jastadd/DumpTree.jrag

src/main/jastadd/Errors.jrag

src/main/jastadd/NameResolution.jrag

src/main/jastadd/Navigation.jrag

src/main/jastadd/RelAst.ast

src/main/jastadd/RelAst.flex

src/main/jastadd/RelAst.parser

src/main/jastadd/RelAst.relast

src/main/jastadd/Ros2Rag.ast

src/main/jastadd/Ros2Rag.relast

src/main/jastadd/backend/AbstractGrammar.jadd

src/main/jastadd/backend/Aspect.jadd

src/main/java/org/jastadd/ros2rag/compiler/Compiler.java

src/main/java/org/jastadd/ros2rag/compiler/SimpleMain.java