add IRC channel to README
add IRC channel to README

Oyamasiphula/mout,millermedeiros/mout,millermedeiros/mout,mout/mout,MathiasPaumgarten/mout,stevemao/mout,stevemao/mout,Oyamasiphula/mout,ChristianGrete/mout,mout/mout,ChristianGrete/mout,MathiasPaumgarten/mout