VK audio:
- add default artwork if audio doesn't have one
- fix error when audio does not have artwork
- disable conflicting (and buggy) vk's own mediaSession implementation. this commit is ugly monkeypatch =)

Yandex.Music:
- add default artwork if audio doesn't have one
- fix error when audio does not have artwork
- add more artwork sizes

vk audio working again

:bug: yandex music switched to eval instead of inline script

Yandex Music added Content Security Policy header, which restricts inline scripts, but, for some reason, allows unsafe-eval. so we can use it for our benefit

## v0.0.5 (2019-04-22)

- Added support for Yandex.Music
- Changed extension name and icon to more generic, because now it is not only VK specific.

v0.0.4 (2019-02-06)

- Fixed: When tab restores from discard, sometimes script is not executed.

- Resolved issue with prev, next controls

- Updated extension description
- Improved stability and `plasma-integration` add-on compatibility