print error message if available - closes #646
print error message if available - closes #646

dandv/webdriverio,monolithed/webdriverio,georgecrawford/webdriverio,mike-suggitt/webdriverio,adjohnson916/webdriverio,dandv/webdriverio,jhoguet/webdriverio,rossPatton/webdriverio,angelsanz/webdriverio,austek-mdsol/webdriverio,compulim/webdriverio,compulim/webdriverio,adjohnson916/webdriverio,milafrerichs/webdriverio,amitaibu/webdriverio,testingbot/webdriverjs,leahciMic/webdriverio,rossPatton/webdriverio,eyalzek/webdriverio,testingbot/webdriverjs,austek-mdsol/webdriverio,Pitzcarraldo/webdriverio,sebastiendavid/webdriverio,saulshanabrook/webdriverio,gabrielpeery/webdriverio,leahciMic/webdriverio,Risto-Stevcev/webdriverio,saulshanabrook/webdriverio,angelsanz/webdriverio,matteonovelli/webdriverio,wcainboundary/webdriverio,sebastiendavid/webdriverio,drptbl/webdriverio,Risto-Stevcev/webdriverio,cto/webdriverio,mike-suggitt/webdriverio,Pitzcarraldo/webdriverio,danielgil/webdriverio,eyalzek/webdriverio,wcainboundary/webdriverio,milafrerichs/webdriverio,georgecrawford/webdriverio,richardmcsong/webdriverio,matteonovelli/webdriverio,amitaibu/webdriverio,richardmcsong/webdriverio,monolithed/webdriverio,danielgil/webdriverio,cto/webdriverio,gabrielpeery/webdriverio,drptbl/webdriverio,jhoguet/webdriverio