fix(tutorial): fixed height for images
fix(tutorial): fixed height for images

minhlong/NamHoa-Ionic,subsolo/ITHC,kumarnavinrai/finalmcu,TobiasSchaeuble/HMAD,pierrecabriere/Greencharge,nReality/SUGSA-ScrumGathering-App2016,tommy-boy/AMZNDEALS,driftyco/ionic-conference-app,abdolmajidazad/neveshtak,kumarnavinrai/finalmcu,nReality/SUGSA-ScrumGathering-App2016,nReality/AgileAfricaConf-app,nReality/SUGSA-ScrumGathering-App2016,TobiasSchaeuble/HMAD,minhlong/NamHoa-Ionic,nReality/AgileAfricaConf-app,nReality/AgileAfricaConf-app,minhlong/NamHoa-Ionic,abdolmajidazad/neveshtak,nReality/SUGSA-ScrumGathering-App2016,Beslinda/catalogIonicApp,ericel/weytindey,nReality/SUGSA-ScrumGathering-App2016,francarmona/ionice-contryside-events-app,pierrecabriere/Greencharge,fmsouza/mangiare,sinholic/aero-flyer,driftyco/ionic-conference-app,nReality/SUGSA-ScrumGathering-App2016,francarmona/ionice-contryside-events-app,TobiasSchaeuble/HMAD,ericel/weytindey,abdolmajidazad/neveshtak,nReality/AgileAfricaConf-app,fmsouza/mangiare,kumarnavinrai/finalmcu,driftyco/ionic-conference-app,tommy-boy/AMZNDEALS,Beslinda/catalogIonicApp,sinholic/aero-flyer,laodice/ionic-conference-app-session2,nReality/SUGSA-ScrumGathering-App2016,Beslinda/catalogIonicApp,pierrecabriere/Greencharge,subsolo/ITHC,ericel/weytindey,fmsouza/mangiare,laodice/ionic-conference-app-session2,laodice/ionic-conference-app-session2,fmsouza/mangiare,francarmona/ionice-contryside-events-app,nReality/AgileAfricaConf-app,nReality/AgileAfricaConf-app,tommy-boy/AMZNDEALS,sinholic/aero-flyer,subsolo/ITHC,nReality/AgileAfricaConf-app