Fix #41 arising from 503 errors from coveralls.io
Fix #41 arising from 503 errors from coveralls.io

manish211/coveralls-python,shippableSamples/sample_python_coveralls,coagulant/coveralls-python,jessamynsmith/coveralls-python,lolletsoc/coveralls-python,coveralls-clients/coveralls-python,ionelmc/coveralls-python,Jwpe/coveralls-python,jvarho/coveralls-python