change location of nyc_ouput to .nyc_output, add note about coveralls messaging
change location of nyc_ouput to .nyc_output, add note about coveralls messaging

bcoe/nyc,strongloop-forks/nyc,jamestalmage/nyc,Lalem001/nyc,istanbuljs/nyc,gtanner/nyc,novemberborn/nyc,lloydcotten/nyc,ronkorving/nyc,schutm/nyc,isaacs/nyc