Mumble Client RPC subcommands

Various RPC subcommands allow users to issue requests to a running Mumble client starting with version 1.3.0.

Command	Description
`mute`	Mute self
`unmute`	Unmute self
`togglemute`	Toggle between mute and unmute
`deaf`	Deafen self
`undeaf`	Undeafen self
`toggledeaf`	Toggle between deaf and undeaf
`starttalking`	Start talking (like Push-To-Talk)
`stoptalking`	Stop talking (like Push-To-Talk)

Use mumble rpc --help to get a list of valid commands.

$ mumble rpc mute
$ mumble rpc unmute