Longphone support for homescreen link/webapp & more commits

Ok, some more commits added (sorry, forgot to created branches for them):

1.
Removed "width=device-width” from viewport meta-tag as it prevents iPhone 5's to go into fullscreen when using a homescreen link/webapp. At the moment it displays the website in the old 3.5" dimensions.

Also updated add2home sources (minor change for iOS 7).

2.
As the callback-names for the jsonp requests of the lastfm api could have been created at the exact same time one successful callback destroyed itself causing:
Uncaught ReferenceError: jsonp1378671658367 is not defined 
for the next successful callback with the same name. I added a random number between 0 and 100 to prevent this.

3.
In all of Spotify's clients the "Starred" Playlist is separated from the others. Mopidy adds it to the very end of the playlist-list but names it "starred" instead of "playlist" in the URI. I moved it to the top of the list because it reflects Spotify's UI and it was annoying to scroll all the way down to get to it.

4.
Changed some styles. Wasn't intended to add this commit to the pull request but I'm not yet used to the way github works :)
Keep or leave whatever you like in this commit.


Great project, thanks a lot! I'd love to contribute something to it :)