#182 - Add PlaylistNextAction

PlayWall/src/main/java/de/tobias/playpad/Strings.java

.../de/tobias/playpad/action/actions/PlaylistNextAction.java

.../de/tobias/playpad/action/factory/CartActionProvider.java

...as/playpad/action/factory/PlaylistNextActionProvider.java

...bias/playpad/action/settings/CartActionSettingsEntry.java

...ypad/action/settings/PlaylistNextActionSettingsEntry.java

.../viewcontroller/actions/AbstractActionViewController.java

.../viewcontroller/actions/CartActionTypeViewController.java

...ypad/viewcontroller/actions/CartActionViewController.java

PlayWall/src/main/resources/components/Actions.xml

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

...Core/src/main/java/de/tobias/playpad/profile/Profile.java