add/rm/md action association block relation, tests non-faits

src/main/java/avatartranslator/mutation/ActionMutation.java

...ain/java/avatartranslator/mutation/AddActionMutation.java

...ava/avatartranslator/mutation/AddAssociationMutation.java

...main/java/avatartranslator/mutation/AddBlockMutation.java

...n/java/avatartranslator/mutation/AddRelationMutation.java

...n/java/avatartranslator/mutation/AssociationMutation.java

src/main/java/avatartranslator/mutation/AvatarMutation.java

...n/java/avatartranslator/mutation/BlockStructMutation.java

...main/java/avatartranslator/mutation/MdActionMutation.java

...in/java/avatartranslator/mutation/MdRelationMutation.java

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

...main/java/avatartranslator/mutation/RmActionMutation.java

...java/avatartranslator/mutation/RmAssociationMutation.java

src/main/java/avatartranslator/mutation/RmBlockMutation.java

...in/java/avatartranslator/mutation/RmRelationMutation.java

...vatartranslator/mutation/StateMachineElementMutation.java

...in/java/avatartranslator/mutation/SwapActionMutation.java

...ava/avatartranslator/mutation/UnnamedElementMutation.java