Add iojs to the build matrix
Add iojs to the build matrix

Andolamin/highland,Whoaa512/highland,svozza/highland,dayoadeyemi/highland,svozza/highland,kjvalencik/highland,Whoaa512/highland,kwangkim/highland,jgrund/highland,icio/highland,caolan/highland,caolan/highland,surgeforward/highland,dayoadeyemi/highland,kwangkim/highland,jgrund/highland,kjvalencik/highland,icio/highland,vqvu/highland,Andolamin/highland,surgeforward/highland,vqvu/highland