#187 - Add new name update listener method to pads

PlayWallCore/src/main/java/de/tobias/playpad/pad/Pad.java

...de/tobias/playpad/pad/listener/PadNameChangeListener.java

...e/src/main/java/de/tobias/playpad/plugin/PadListener.java

...ias/playpad/equalizerplugin/impl/EqualizerPluginImpl.java

...aypad/plugin/playout/log/listener/PadPlayLogListener.java

...ain/scala/de/tobias/playpad/plugin/api/WebApiPlugin.scala

...laypad/plugin/api/websocket/listener/PadApiListener.scala