refactored file handling

src/main/java/de/tlc4b/TLC4B.java

src/main/java/de/tlc4b/TLCRunner.java

src/main/java/de/tlc4b/Translator.java

src/main/java/de/tlc4b/analysis/ConstantsEliminator.java

src/main/java/de/tlc4b/analysis/ConstantsEvaluator.java

src/main/java/de/tlc4b/analysis/MachineContext.java

...ava/de/tlc4b/analysis/typerestriction/TypeRestrictor.java

src/test/java/de/tlc4b/analysis/TypeRestrictionsTest.java

src/test/java/testing/Testing2.java

...st/resources/errors/EnumerationError/EnumerationError.cfg

...st/resources/errors/EnumerationError/EnumerationError.tla