fix test: target

Signed-off-by: Niv Sardi <xaiki@evilgiggle.com>
add ffmpeg to the travis install

Signed-off-by: Niv Sardi <xaiki@evilgiggle.com>
port npm test to use the makefile

Signed-off-by: Niv Sardi <xaiki@evilgiggle.com>