Add Rena Mumble music bot in README

[lolcatw]

Hello again... I finally did it, after 2 nights of not sleeping: https://git.lolcat.ca/lolcat/rena_mumble

I made a music bot for mumble! Functionally, it works a bit like fredboat over on discord. Queue songs and play them from youtube!

I was wondering if it would be possible to add the project as an example of something that was built using this library?

Thanks!

[lolcatw]

Also, I hate to ask here but for some reason when the bot idles for a certain time, it stops responding to channel messages. Voice still works. The only way to fix it is to manually make it switch channels around. The current workaround is to send channel change packets to the current channel. Any tips?