Made Playback Buttons long clickable to show a toast of the action to be performed
Added net.xml package and moved the xml content handlers to it. Namespaced the content handlers with "Xml" prefix
Added JsonContentHandler and JsonStatusContentHandler to handle status requests using the JSON interface. JSON is now the preferred format for statuses because it contains some information that the XML format doesn't (e.g. chapters, titles). Older VLC's will fall back to the XML format if no JSON interface exists
Added next/previous chapter playback buttons in PlaybackFragment. Updated JSON status parser to handle the chapters. Added chapters command to the MediaServer. Although VLC has had a chapter api command for a while, only since version 2.1.0 the current chapter has been added. Without the current chapter, previous or next chapters cannot be calculated.