See issue #17.

- Hopefully fixes audio volume not being set to 50% at startup.
- Volume now is in the range of 0 to 200 (percentage, so goes from 0% to 200% for those numbers).
- Made message displaying volume change display the actual level set.
- We're no longer providing an HTTP interface.
- Now stores metadata info in a separate variable for later retrieval by input MRL.
- Now prints when player reaches end of playlist.
- Now supports toggle-pausing using "pause" command.
- Should fix playlist not being able to kick off on "play" if stopped.
- Removed vlc-api dependency.

Relates to issues #17, #10 and #7 (partially).

Got the documentation wrong here, I was looking up examples and it looked as if calling the on* fields as functions was the right way to go but it was actually not. https://github.com/RSATom/WebChimera.js/blob/64bf4ffc362898e309c8a444c8888ad7b4bfae92/src/JsVlcPlayer.cpp#L90-L102 clearly defines as set-properties here.

Those values are not supposed to be accepted in the first place...

These commands allow going to the previous entry in the playlist.

These commands allow emptying the current playlist. Here another reminder to implement a proper permission system soon!

These commands make the bot print out the current playlist in the channel chat. The current track being played back is printed in bold green font.

This command allows looping the playlist by just passing the command "loop on". Respectively, "loop off" turns off looping again.

This command allows stopping the playlist after the current playlist item is finished.

…ssages, commenting out for now.

…I guess...

onEndReached does not just trigger the callback at the end of the playlist but actually at the end of each track. This should have been better documented.