Song already being scrobbled by another scrobbler

[stephanebruckert]

What to do when Shazam detects a song being scrobbled by another scrobbler?

Suggestion:

• check if Last.fm is already "Scrobbling from X",
• or check if the song has already been scrobbled in the last 5 minutes.

Basically the goal of this enhancement is to let ShazamScrobbler open:

• even if we are scrobbling from somewhere else,
• without scrobbling the songs twice.

[stephanebruckert]

Adding the ability to not scrobble when a different scrobbler was already scrobbling involved the removal of the "now playing" feature (at least for now).