correction commentaires + add/rm/md state et transition

.../java/avatartranslator/mutation/AddAttributeMutation.java

...ain/java/avatartranslator/mutation/AddMethodMutation.java

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

...main/java/avatartranslator/mutation/AddStateMutation.java

...java/avatartranslator/mutation/AddTransitionMutation.java

...ain/java/avatartranslator/mutation/AttributeMutation.java

...ranslator/mutation/AvatarStateMachineElementMutation.java

...n/java/avatartranslator/mutation/MdAttributeMutation.java

...main/java/avatartranslator/mutation/MdMethodMutation.java

src/main/java/avatartranslator/mutation/MdMutation.java

...main/java/avatartranslator/mutation/MdSignalMutation.java

.../java/avatartranslator/mutation/MdTransitionMutation.java

src/main/java/avatartranslator/mutation/MethodMutation.java

...n/java/avatartranslator/mutation/RmAttributeMutation.java

...main/java/avatartranslator/mutation/RmMethodMutation.java

src/main/java/avatartranslator/mutation/RmMutation.java

...main/java/avatartranslator/mutation/RmSignalMutation.java

src/main/java/avatartranslator/mutation/RmStateMutation.java

.../java/avatartranslator/mutation/RmTransitionMutation.java

src/main/java/avatartranslator/mutation/SignalMutation.java