Only invoke coveralls when within travis
Only invoke coveralls when within travis

allows simplecov to generate nice reports when executed locally

machiavellian/machiavelli,glasnt/machiavelli,machiavellian/machiavelli,glasnt/machiavelli,machiavellian/machiavelli,glasnt/machiavelli,glasnt/machiavelli,machiavellian/machiavelli