Add bindings 'gt'->nextTab 'gT'->previousTab
Add bindings 'gt'->nextTab 'gT'->previousTab

These are the default vim bindings to navigate between tabs.

csmalin/vimium,zhangmin510/vimium,Aleroniponi/vimium,crazypenguincode/vimium,wildeyes/vimium,decaffeinate-examples/vimium,hhsue/vimium,wildeyes/vimium,borgified/vimium,jb55/vimium-plus,csmalin/vimium,Aleroniponi/vimium,cyrixhero/vimium,PrestanceDesign/vimium,smblott-github/vimium,zhangmin510/vimium,shaung/vimium,Lw-Cui/vimium,borgified/vimium,wildeyes/vimium,PrestanceDesign/vimium,bkudria/vimium,PickRelated/vimium,decaffeinate-examples/vimium,justalittlenoob/vimium,elderbas/vimium,PrestanceDesign/vimium,Robinson10240/vimium,hhsue/vimium,poacher2k/vimium,justalittlenoob/vimium,dimatter/vimium,douglas-larocca/vimium,jb55/vimium-plus,willsALMANJ/vimium,elegantwww/vimium,poacher2k/vimium,mrmr1993/vimium,philc/vimium,PickRelated/vimium,smblott-github/vimium-smblott,tuchangwei/vimium,tuchangwei/vimium,willsALMANJ/vimium,llimllib/vimium,smblott-github/vimium-smblott,philc/vimium,VPashkov/vimium,smblott-github/vimium,bkudria/vimium,Lw-Cui/vimium,gdh1995/vimium,gdh1995/vimium,bkudria/vimium,douglas-larocca/vimium,cyrixhero/vimium,tuchangwei/vimium,poacher2k/vimium,dimatter/vimium,Lw-Cui/vimium,elegantwww/vimium,PickRelated/vimium,VPashkov/vimium,csmalin/vimium,elderbas/vimium,elderbas/vimium,gdh1995/vimium,mrmr1993/vimium,Aleroniponi/vimium,VPashkov/vimium,crazypenguincode/vimium,douglas-larocca/vimium,justalittlenoob/vimium,hhsue/vimium,elegantwww/vimium,cyrixhero/vimium,zhangmin510/vimium,Robinson10240/vimium,mrmr1993/vimium,decaffeinate-examples/vimium,dimatter/vimium,borgified/vimium,Robinson10240/vimium,philc/vimium,smblott-github/vimium,willsALMANJ/vimium