Fix #1435 (mixins being called before definition)
Fix #1435 (mixins being called before definition)

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