WIP dumpAst (and some cleanup of grammar2uml)

dumpAst2uml/build.gradle

dumpAst2uml/src/main/jastadd/DumpAst.relast

dumpAst2uml/src/main/jastadd/Generation.jadd

dumpAst2uml/src/main/jastadd/Navigation.jrag

dumpAst2uml/src/main/jastadd/Printing.jrag

...ain/java/org/jastadd/dumpAst2uml/compiler/SimpleMain.java

dumpAst2uml/src/main/resources/dumpAst.mustache

dumpAst2uml/src/main/resources/dumpAst2umlVersion.properties

grammar2uml/build.gradle

grammar2uml/src/main/jastadd/Navigation.jrag

libs/plantuml.jar