Garry's Mod JukeBox - YouTube Music Player

1. Fixed an issue with songs under 1 minute returning their value as minutes (PHP Code Update, should have fixed automatically now).
2. Added checks to (hopefully) fix a rare reported issue with Accepting songs causing errors with the notification system.
3. Added JS to set the volume of the JukeBox when the client loads (this should hopefully prevent people's volume's not being set).

Please note that from now on the default value of JukeBox.Settings.VoteSkipPercent will be 60% rather than 80%. Remember to change this if you don't want it like this.

There have been no changes to the shared_settings.lua file, so you don't need to overwrite your version of the file.