separate relast preprocessor from ros2rag

.gitignore

build.gradle

src/main/jastadd/Analysis.jrag

src/main/jastadd/DumpTree.jrag

src/main/jastadd/NameResolution.jrag

src/main/jastadd/Navigation.jrag

src/main/jastadd/Preamble.parser

src/main/jastadd/RelAst.flex

src/main/jastadd/RelAst.parser

src/main/jastadd/RelAst.relast

src/main/jastadd/backend/AbstractGrammar.jadd

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

src/main/java/org/jastadd/relast/compiler/Utils.java

...java/org/jastadd/relast/compiler/options/CommandLine.java

.../java/org/jastadd/relast/compiler/options/EnumOption.java

.../java/org/jastadd/relast/compiler/options/FlagOption.java

...main/java/org/jastadd/relast/compiler/options/Option.java

...ava/org/jastadd/relast/compiler/options/StringOption.java

src/main/resources/log4j2.xml

src/test/java/org/jastadd/ros2rag/tests/RelAstTest.java