removed --use-mirrors on travis.yml, its deprecated
removed --use-mirrors on travis.yml, its deprecated

MSylvia/pyNES,shekkbuilder/pyNES,jay-johnson/pyNES,imanmafi/pyNES,tekromancr/pyNES,bigpete/pyNES,bradparks/pyNES__python_8bit_nes_games_nintendo,kubov/pyNES,edwardpark/pyNES,BmanisKing/Mine,gutomaia/pyNES,sperez4mba/pyNES,stellatigre/pyNES,Militree/pyNES,ftick/pyNES,arabenjamin/pyNES,kod3r/pyNES,GrimDerp/pyNES,jmgaya/pyNES,danielserva/pyNES,DaTrollMon/pyNES,JohnKossa/pyNES,silky/pyNES,fufufanatic/pyNES,NickDeckerDevs/pyNES,shaunstanislaus/pyNES,Gybes/pyNES,AsSheng/pyNES