added bookmark commands to readme
added bookmark commands to readme

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