Rename black action in media plugin; Rename media plugin package

...va/de/tobias/playpad/plugin/media/action/BlackAction.java

...obias/playpad/plugin/media/action/BlackActionFactory.java

...va/de/tobias/playpad/plugin/media/image/ImageContent.java

...as/playpad/plugin/media/image/ImagePadContentFactory.java

...va/de/tobias/playpad/plugin/media/main/VideoSettings.java

...obias/playpad/plugin/media/main/impl/MediaPluginImpl.java

...lugin/media/main/impl/MediaSettingsTabViewController.java

...s/playpad/plugin/media/main/impl/MediaViewController.java

...ava/de/tobias/playpad/plugin/media/main/impl/Strings.java

...va/de/tobias/playpad/plugin/media/video/VideoContent.java

...as/playpad/plugin/media/video/VideoPadContentFactory.java

...plugin/media/video/VideoPadSettingsTabViewController.java

PlayWallPluginMedia/src/main/resources/Actions.xml

PlayWallPluginMedia/src/main/resources/PadContent.xml

...llPluginMedia/src/main/resources/lang/video_de.properties

PlayWallPluginMedia/src/main/resources/plugin.yml