package: add "speaker" as a devDependency because of the mp3player.js example
package: add "speaker" as a devDependency because of the mp3player.js example

PlayNetwork/node-lame,EQ4/node-lame,EQ4/node-lame,PlayNetwork/node-lame,TooTallNate/node-lame,mcanthony/node-lame,mcanthony/node-lame,PlayNetwork/node-lame,EQ4/node-lame,dag10/node-lame,mcanthony/node-lame,dag10/node-lame,TooTallNate/node-lame,dag10/node-lame,TooTallNate/node-lame