Fix #263, document HTML comments & IE conditionals
Fix #263, document HTML comments & IE conditionals

tubo028/hugo,tubo028/hugo,tatsushid/hugo,mitchchn/hugo,derekperkins/hugo,mayah/hugo,badoet/hugo,anthonyfok/hugo,bramp/hugo,Zenithar/hugo,bramp/hugo,derekperkins/hugo,fedelibre/hugo,digitalcraftsman/hugo,kujohn/hugo,jygastaud/hugo,abourget/hugo,fedelibre/hugo,digitalcraftsman/hugo,mdhender/hugo,bogem/hugo,ryanclarke/hugo,fedelibre/hugo,MarkDBlackwell/hugo,Zenithar/hugo,vbatoufflet/hugo,MarkDBlackwell/hugo,ifraixedes/hugo,bogem/hugo,melo/hugo,abourget/hugo,mdhender/hugo,coderzh/hugo,tischda/hugo,melo/hugo,fhergomez/hugo,soundrussian/hugo,halostatue/hugo,halostatue/hugo,sprig/hugo,tischda/hugo,mdhender/hugo,mdhender/hugo,tjyang/hugo,tatsushid/hugo,tjyang/hugo,soundrussian/hugo,ryanclarke/hugo,mayah/hugo,fedelibre/hugo,gohugoio/hugo,anthonyfok/hugo,mitchchn/hugo,gohugoio/hugo,ffrizzo/hugo,kujohn/hugo,fhergomez/hugo,sprig/hugo,badoet/hugo,gohugoio/hugo,coderzh/hugo,vbatoufflet/hugo,jygastaud/hugo,ffrizzo/hugo,anthonyfok/hugo,ifraixedes/hugo