Added more "clean" logging

...ain/java/de/hhu/ba/yoshikoWrapper/core/YoshikoLoader.java

...n/java/de/hhu/ba/yoshikoWrapper/gui/DoubleInputField.java

...main/java/de/hhu/ba/yoshikoWrapper/gui/EditCostPanel.java

src/main/java/de/hhu/ba/yoshikoWrapper/gui/FormatHelper.java

src/main/java/de/hhu/ba/yoshikoWrapper/gui/MainPanel.java

.../de/hhu/ba/yoshikoWrapper/gui/ModificationCostMapper.java

.../java/de/hhu/ba/yoshikoWrapper/gui/YoshikoHelpDialog.java

...n/java/de/hhu/ba/yoshikoWrapper/gui/YoshikoHelpModel.java

.../java/de/hhu/ba/yoshikoWrapper/logging/YoshikoLogger.java

...n/java/de/hhu/ba/yoshikoWrapper/logging/package-info.java