Patching several bugs in mutation compiler and adding some tests

.idea/runConfigurations.xml

...java/avatartranslator/mutation/AddConnectionMutation.java

...ain/java/avatartranslator/mutation/AddSignalMutation.java

src/main/java/avatartranslator/mutation/MutationParser.java

...main/java/avatartranslator/mutation/RelationMutation.java

.../java/avatartranslator/mutation/RmConnectionMutation.java

ttool/src/test/java/avatartranslator/ParseMutationTests.java