Add a voting system

[preabo]

When a link is posted the bot should react with "thumbs up" & "thumbs down" and people vote on the songs to make some sort of top 5 songs for the week maybe. Or general showing of the communities likes and dislikes.

[niksudan]

This has been added in 0.4.0!

The source code for this bot doesn't handle automatic reactions to song links, but it will tally up 👍 and 👎 totals and use it to determine the playlist order (as we run these scripts once a week, rather than watch everything that goes on in a server).

It will also show the most liked tracks in the summary, and will exclude tracks that have been disliked enough times.