go-tour: remove protocol from webfont script tag
go-tour: remove protocol from webfont script tag

Fixes font loading on HTTPS sites.

TBR=dsymonds
R=golang-codereviews
CC=golang-codereviews
https://codereview.appspot.com/82920043

anoopKm/go-tour,kratzers/go-tour,wangbinxiang/go-tour,deskamuhammad/go-tour,anoopKm/go-tour,enquiree/go-tour,lanqisong/go-tour,alokjha/go-tour,pipamc/go-tour,ardorleo/go-tour,pandagis/go-tour,RobertWang/go-tour,arinbec/go-tour,ardorleo/go-tour,linchangyi/go-tour,deskamuhammad/go-tour,pandagis/go-tour,johnwahba/go-tour,HJoYer/go-tour,windream/go-tour,ZinedinShiqin/go-tour,pipamc/go-tour,apm-alberto/go-tour,RobertWang/go-tour,Serghei123/go-tour,kkandori/go-tour,Serghei123/go-tour,pamaehara/go-tour,kkandori/go-tour,yiyiboy2010/go-tour,blankme/go-tour,ZinedinShiqin/go-tour,linchangyi/go-tour,angrysumit94/go-tour,oslet/go-tour,windream/go-tour,johnwahba/go-tour,enquiree/go-tour,johnwahba/go-tour,shane-Git/go-tour,windream/go-tour,apm-alberto/go-tour,RobertWang/go-tour,wangbinxiang/go-tour,apm-alberto/go-tour,oslet/go-tour,kratzers/go-tour,kratzers/go-tour,lanqisong/go-tour,alokjha/go-tour,yiyiboy2010/go-tour,pipamc/go-tour,pamaehara/go-tour,linchangyi/go-tour,anahitas72/go-tour,HJoYer/go-tour,yiyiboy2010/go-tour,lanqisong/go-tour,kkandori/go-tour,xjliao/go-tour,arinbec/go-tour,anahitas72/go-tour,ardorleo/go-tour,pandagis/go-tour,arinbec/go-tour,alokjha/go-tour,blankme/go-tour,HJoYer/go-tour,angrysumit94/go-tour,anahitas72/go-tour,shane-Git/go-tour,wangbinxiang/go-tour,angrysumit94/go-tour,deskamuhammad/go-tour,huilinhsu/go-tour,ZinedinShiqin/go-tour,shane-Git/go-tour,pamaehara/go-tour,oslet/go-tour,xjliao/go-tour,anoopKm/go-tour,blankme/go-tour,huilinhsu/go-tour,huilinhsu/go-tour,Serghei123/go-tour,enquiree/go-tour,xjliao/go-tour