updated evalfun() usage in ngram
updated evalfun() usage in ngram

XSEDEScienceGateways/textgateway,wrathematics/TAG,XSEDEScienceGateways/TAG,XSEDEScienceGateways/TAG,wrathematics/TAG,XSEDEScienceGateways/TAG,XSEDEScienceGateways/textgateway,wrathematics/TAG,XSEDEScienceGateways/textgateway