test: add first Decoder test
test: add first Decoder test

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