Update all service integration script to use the latest features & guidelines

[jiri-janousek]

Script	Icon- set	CONTRI- BUTING.md	Change- log	License field	WebKit Upgrade	PR
8tracks	ok	ok	ok	ok	n/a	n/a
Amazon Cloud Player	ok	ok	ok	ok	n/a	#18
Bandcamp	ok	ok	ok	ok	n/a	n/a
Deezer	ok	ok	ok	ok	n/a	n/a
Google Play Music	ok	ok	ok	ok	ok	n/a
Groove	ok	ok	ok	ok	n/a	#3
Jango	ok	ok	ok	ok	n/a	#10
Kexp	ok	ok	ok	ok	n/a	#2
Logitech Media Server	ok	ok	ok	ok	n/a	#2, #3
Mixcloud	ok	ok	ok	ok	n/a	#8
Plex Music	ok	ok	ok	ok	n/a	#7, #8
Soundcloud	ok	ok	ok	ok	ok	#7
Spotify	ok	ok	ok	ok	ok	#15, #16
Tune In	ok	ok	ok	ok	n/a	#3
Yandex Music	ok	ok	ok	ok	n/a	n/a
YouTube	ok	ok	ok	ok	n/a	#6

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[jiri-janousek]

:tada: The table is filled up with ok/PR/na :+1: Let's finish it the next month.

[jiri-janousek]

Done 🎉