Allow to use custom play/pause icons

[flipflop133]

Display album name in tooltip.

[flipflop133]

For this to work, proper configuration must be used in Waybar config file by adding the following to the media section:

"format-icons": {
			"Playing": "\uf144",
			"Paused": "\uf28b"
		}

I'll add it to the wiki in the proper section if the pull request is merged.

[Alexays]

Can you update default config to include icon? :)

[flipflop133]

Sorry for the late answer, I've been busy with university (and still am). Hope I made the right changes but it should be fine. :)