travis, added 2-cpu support for faster build
travis, added 2-cpu support for faster build

dawnsong/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,stnava/ANTs,stnava/ANTs,DaisukeMiyamoto/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,dawnsong/ANTs,dawnsong/ANTs,fliem/ANTs,stnava/ANTs,fliem/ANTs,dawnsong/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,stnava/ANTs,fbudin69500/ANTs,stnava/ANTs,dawnsong/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,fliem/ANTs,DaisukeMiyamoto/ANTs,stnava/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,dawnsong/ANTs