Refactored Visualizer interface

src/main/java/Interfaces/Visualizer.java

src/main/java/MainClasses/GeneticAlgorithm.java

src/main/java/MainClasses/Main.java

.../java/Visualization/Visualizers/BestFoldingToConsole.java

...in/java/Visualization/Visualizers/BestFoldingToImage.java