Add support for playlists

[feerlessleadr]

Thanks @Tolriq, apologies for not following that straight away. I opened up a new topic below:

Emby Playlists Don't Import

Be sure to read https://yatse.tv/wiki/debug-yatse-kodi-remote to provide necessary logs and information. Issue description: First off, just want to say thanks for this application, it works really well. I just discovered that I could use this with emby, and it is working out great for listening to my music via emby. My only issue so far is that my emby playlists don’t seem to be populating in yatse, either automatically, or through import. I am able to create smart playlists directly in yatse,…