package: update "nan" to v1.8.4
package: update "nan" to v1.8.4

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