Squashed commit of the following:

commit b0356142a62248198243f8f5607015abe3fd0ae7
Author: Joshua Popoff <koala@kamino.in>
Date:   Wed Dec 11 03:36:45 2013 -0800

    Add the ability to mute and unmute all players. This commit adds the /unmute command, and removes the unmute ability from /mute. Ticket: ESS-4941

commit 6c2be9b306f4af22781cea64a1dd3864202aee56
Author: Joshua Popoff <koala@kamino.in>
Date:   Wed Dec 11 03:31:23 2013 -0800

    Revert "Add the ability to mute and unmute all players."

    This reverts commit 3e0715e5f7e7beefa9bc276f227c98bd79f6c635.

commit 3e0715e5f7e7beefa9bc276f227c98bd79f6c635
Author: Joshua Popoff <koala@kamino.in>
Date:   Wed Dec 11 03:20:31 2013 -0800

    Add the ability to mute and unmute all players.
    This commit adds the /unmute command, and removes the unmute ability from /mute.
    Ticket: ESS-4941