clean up, added missing feedback node

...g-pkg/.gradle/6.7.1/executionHistory/executionHistory.bin

...-pkg/.gradle/6.7.1/executionHistory/executionHistory.lock

...study-sorting-pkg/.gradle/6.7.1/fileHashes/fileHashes.bin

...tudy-sorting-pkg/.gradle/6.7.1/fileHashes/fileHashes.lock

...ting-pkg/.gradle/6.7.1/fileHashes/resourceHashesCache.bin

...y-sorting-pkg/.gradle/6.7.1/javaCompile/classAnalysis.bin

...udy-sorting-pkg/.gradle/6.7.1/javaCompile/jarAnalysis.bin

...dy-sorting-pkg/.gradle/6.7.1/javaCompile/javaCompile.lock

...udy-sorting-pkg/.gradle/6.7.1/javaCompile/taskHistory.bin

...ng-pkg/.gradle/buildOutputCleanup/buildOutputCleanup.lock

...lasses/java/main/de/tudresden/inf/st/sorting/Main$1.class

.../classes/java/main/de/tudresden/inf/st/sorting/Main.class

...e/tudresden/inf/st/sorting/constants/TokenConstants.class

...tudresden/inf/st/sorting/handlers/ShowResultHandler.class

.../tudresden/inf/st/sorting/handlers/SortColorHandler.class

...main/de/tudresden/inf/st/sorting/nodes/FeedbackNode.class

...e/tudresden/inf/st/sorting/nodes/LeftControllerNode.class

.../tudresden/inf/st/sorting/nodes/RightControllerNode.class

...main/de/tudresden/inf/st/sorting/nodes/SelectorNode.class

.../de/tudresden/inf/st/sorting/nodes/SynchronizerNode.class