[Feature Request] Add support for animated album art

[SRC267]

So I've not yet seen a music player have the ability to support GIFs as album art before. Wondering if this is feasible. Is it even possible to embed GIFs to the meta data?

A solution to this could be to add GIFs to a separate folder that share the same name as the title track, so that it matches up and both can be displayed and function from the apps UI. Poweramp has this approach, where they have album art stored in a different folder, albeit it's only static images; they don't support GIFs.

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