issue #56, update language on index.html
issue #56, update language on index.html

AvidGeo/foss4g2017,artardif/foss4g2017-dev,AvidGeo/foss4g2017,AvidGeo/foss4g2017-dev,AvidGeo/foss4g2017-dev,artardif/foss4g2017-dev,artardif/foss4g2017-dev,AvidGeo/foss4g2017,AvidGeo/foss4g2017-dev