Remove support for 0.8
Remove support for 0.8

At the moment everything works except for building using browserify.  I
don't want to support the necessary conditions in tests as that would be
really pointless, so I'm just dropping formal support for 0.8

cutsin/jade,cgvarela/jade,Shinchy/jade,jjz/jade,illusionfield/jade,jadejs/then-jade,coderhaoxin/jade,jirengu/jade,mrotaru/jade,webmasteraxe/jade,muthhus/jade,jadejs/then-jade,coderhaoxin/jade,slang800/yade,webskyer/jade,Laoujin/jade,angrilove/jade,fredyteheranto/jade,pugjs/jade,pugjs/then-jade,ilovezy/jade,ceremcem/jade,magicdawn/jade,fredyteheranto/jade,gexiaowei/jade,nyakto/jade-async,cutsin/jade,webmasteraxe/jade,jjz/jade,colin-h/jade,angrilove/jade,Mitrend/jade,cesarmarinhorj/jade,jodytate/jade,tranhieutt/jade,gdibble/jade,cgvarela/jade,harp/jade,pugjs/pug,rajnishyadav321/jade,bogus34/jade-vfs,VANITAX/jade,Laoujin/jade,colin-h/jade,mumaoxi/jade,Victorgichohi/jade,andreytkachenko/jade,martindale/jade,gexiaowei/jade,Mitrend/jade,harp/jade,pugjs/then-jade,angryrobot/jade,jodytate/jade,cesarmarinhorj/jade,magicdawn/jade,VANITAX/jade,muthhus/jade,hnag409/jade,jirengu/jade,gdibble/jade,hnag409/jade,tranhieutt/jade,ridixcr/jade,pugjs/pug,angryrobot/jade,modulexcite/jade,omixen/jade,VeraWei/jade,mrotaru/jade,modulexcite/jade,nyakto/jade-async,omixen/jade,bogus34/jade-vfs,Shinchy/jade,webskyer/jade,martindale/jade,timmfin/jade,Victorgichohi/jade,illusionfield/jade,ilovezy/jade,pugjs/jade,flintinatux/jade,ridixcr/jade,rajnishyadav321/jade,andreytkachenko/jade,mumaoxi/jade,VeraWei/jade