add GDG DevFest Hamburg to the list of template users (#82)
add GDG DevFest Hamburg to the list of template users (#82)


GDG-Ukraine/hoverboard,GDG-Dusseldorf/devfest2016,GDG-Los-Angeles/hoverboard,fchuks/hoverboard,fchuks/hoverboard,capivaracodes/capivaracodesconference-site,GDG-Ukraine/hoverboard,GDG-Nantes/devfest2017,gdgmadrid/devfest,DevIntent/DevFestFloridaSite,BruGTUG/DevFest2016,GDG-Bambili/devfest-mezam,DevIntent/DevFestFloridaSite,gdgmadrid/devfest,GDGTaipei/DevFest2016,BruGTUG/DevFest2016,GDGJKUAT/DevFestThikaRd2016,JozhAranda/GDGTJ-DevFest16,GDG-Bambili/devfest-mezam,GDGKualaLumpur/devfestkl16,capivaracodes/capivaracodesconference-site,GDG-Dusseldorf/devfest2016,GDGJKUAT/DevFestThikaRd2016,GDGKualaLumpur/devfestkl16,GDG-Nantes/devfest2017,GDGTaipei/DevFest2016,GDGKoreaCampus/homepage,gdg-eskisehir/wtm17,JozhAranda/GDGTJ-DevFest16,GDG-Los-Angeles/hoverboard,GDGKoreaCampus/homepage,GDGYangon/gdg-yangon-devfest-2015-website,GDGYangon/gdg-yangon-devfest-2015-website,gdg-eskisehir/wtm17