Merge pull request #19 from triplem/upstream

If a cover picture is not available the default image is used.
Songcast: tweaked songcast to make it more reliable
Radio: implemented new Reader to read TuneIn type config from RadioList.json. Just need my PartnerId now..
Merge branch 'master' of https://github.com/PeteManchester/MediaPlayer
Update README.md
Tidied up SongcastMessage
Merge branch 'master' of https://github.com/PeteManchester/MediaPlayer

Conflicts:
	README.md