Merge branch 'feature/166_trigger' into 'develop'

PlayWall/src/main/resources/lang/_de.properties

...ain/java/de/tobias/playpad/pad/PadSettingsSerializer.java

...ypad/pad/listener/trigger/PadTriggerDurationListener.java

...laypad/pad/listener/trigger/PadTriggerStatusListener.java

...lCore/src/main/java/de/tobias/playpad/tigger/Trigger.java

.../src/main/java/de/tobias/playpad/tigger/TriggerPoint.java