Fix Bandcamp connector
Fix Bandcamp connector

Add event listeners to all audio element.

Closes #2639.

inverse/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,inverse/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,carpet-berlin/web-scrobbler,david-sabata/web-scrobbler,carpet-berlin/web-scrobbler,david-sabata/web-scrobbler