Add note to datafiles docs around CSV's.
Add note to datafiles docs around CSV's.

Ref: #2761

martynbm/jekyll,PepSalehi/jekyll,tobscure/jekyll,Tiger66639/jekyll,Strangehill/jekyll,alihalabyah/jekyll,tamouse/jekyll,kuangyeheng/jekyll,daniel-beck/jekyll,Tyrion22/jekyll,mnuessler/jekyll,superve/jekyll,ls2uper/jekyll,garvitr/jekyll,lazycai/lazycai.github.com,bsmr-ruby/jekyll,rovrevik/jekyll,stevecrozz/jekyll,0x00evil/jekyll,m2candre/jekyll,greent2008/jekyll,UniFreak/jekyllcn,SQS2/Test,LuoPX-15510486969/jekyll,AtekiRyu/jekyll,brint/jekyll,UniFreak/jekyllcn,vcgato29/jekyll,stevecrozz/jekyll,cyberid41/jekyll,darwin/jekyll,saitodisse/jekyll,jaybe-jekyll/jekyll,xiaoshaozi52/jekyll,winndows/jekyll,gaosboy/jekyll,nateberkopec/jekyll,alihalabyah/jekyll,vcgato29/jekyll,gynter/jekyll,drobati/jekyll,ewinkler/jekyll,alfredxing/jekyll,fengsmith/jekyllcn,Kinghack/kinghack.github.com,doubleday/jekyll,julienbourdeau/jekyll,0x00evil/jekyll,royalwang/jekyll,supriyantomaftuh/jekyll,ewinkler/jekyll,rlugojr/jekyll,winndows/jekyll,likong/jekyll,vcgato29/jekyll,sideci-sample/sideci-sample-jekyll,jekyll/jekyll,QuinntyneBrown/jekyll,adilapapaya/jekyll,anthonyrosengren/grasshoppergathering2.github-io,indraj/jekyll,iRoxx/jekyll,AtekiRyu/jekyll,stevecrozz/jekyll,xcatliu/jekyllcn,julienbourdeau/jekyll,chiyodad/jekyll,dansef/jekyll,imaustink/jekyll,zsyed91/jekyll,omeripek/jekyll,liukaijv/jekyll,jaybe-jekyll/jekyll,tugberkugurlu/jekyll,nasht00/jekyll,imaustink/jekyll,CPVPLachlan/CPVP-Blog,nathanhorrigan1/webdeveloper,eloyesp/jekyll,stomar/jekyll,rongl/jekyll,monxim/monxim.github.io,shliujing/jekyll,leichunxin/jekyll,jmknoll/jekyll,ajhit406/jekyll,kimeng/jekyll,nasht00/jekyll,tamouse/jekyll,teju111/jekyll,royalwang/jekyll,alex-kovac/jekyll,thetaxman/jekyll,fengsmith/jekyllcn,Teino1978-Corp/Teino1978-Corp-jekyll,johnnycastilho/jekyll,Teino1978-Corp/jekyll,leichunxin/jekyll,kimeng/jekyll,hiteshsuthar/jekyll,Teino1978-Corp/jekyll,Kinghack/kinghack.github.com,mixxmac/jekyll,MjAbuz/jekyll,kinlane/jekyll,Tiger66639/jekyll,harrissoerja/jekyll,pmarsceill/jekyll,xiebinhqy/jklly_china,PepSalehi/jekyll,larryfox/jekyll,rajrathore/jekyll,lazycai/lazycai.github.com,CheekyFE/jekyll,fulldecent/jekyll,larryfox/jekyll,jaybe-jekyll/jekyll,omeripek/jekyll,ramoslin02/jekyll,derekgottlieb/jekyll,Wirachmat/jekyll,tareq-s/jekyll,Strangehill/jekyll,dezon/jekyll,abhilashhb/jekyll,winndows/jekyll,angeliaz/jekyll,xiebinhqy/jklly_china,MauroMrod/jekyll,thejameskyle/jekyll,krishnakalyan3/jekyll,jaroot32/jekyll,greent2008/jekyll,LuoPX-15510486969/jekyll,egobrightan/jekyll,gaosboy/jekyll,wadaries/jekyll,teju111/jekyll,alfredxing/jekyll,jaroot32/jekyll,Strangehill/jekyll,chrisfinazzo/jekyll,nateberkopec/jekyll,MauroMrod/jekyll,daniel-beck/jekyll,adilapapaya/jekyll,rasa2011/rasa2011.github.io,honger05/jekyllcn,fabulousu/jekyll,wentixiaogege/jekyll,tugberkugurlu/jekyll,x-way/jekyll,nickg33/jekyll,schaazzz/jekyll,pheuko/jekyll,christophermanning/jekyll,hiteshsuthar/jekyll,ryanshaw/jekyll,rasa2011/rasa2011.github.io,goragod/jekyll,tylermachen/jekyll,getandpost/jekyll.github.io,jaybe-jekyll/jekyll,jeffkole/jekyll,zsyed91/jekyll,shuber2/jekyll,ZainRizvi/jekyll,rebornix/jekyll,fabulousu/jekyll,mnuessler/jekyll,sasongkojati/jekyll,desidude03/jekyll,vidbina/jekyll,rongl/jekyll,LeuisKen/jekyllcn,ReachingOut/jekyll,krishnakalyan3/jekyll,rongl/jekyll,chrisfinazzo/jekyll,tomjohnson1492/jekyll,UniFreak/jekyllcn,AaronSikes/jekyll,alfredxing/jekyll,gencer/jekyll,doubleday/jekyll,naughtyboy83/jekyll,alfredxing/jekyll,0x00evil/jekyll,fengsmith/jekyll,htmelvis/jekyll,oresmus/jekyll,eninya/jekyll,bsmr-ruby/jekyll,dangaute/eng,trungvothanh/jekyll,nickg33/jekyll,LeuisKen/jekyllcn,princeofdarkness76/jekyll,pmarsceill/jekyll,MjAbuz/jekyll,teju111/jekyll,angeliaz/jekyll,yihangho/jekyll,zsyed91/jekyll,greent2008/jekyll,jeffkole/jekyll,wadaries/jekyll,gkunwar/gkunwar.github.io,darwin/jekyll,nasht00/jekyll,fengsmith/jekyllcn,jeffkole/jekyll,matuzo/jekyll,getandpost/jekyll.github.io,Strangehill/jekyll,x-way/jekyll,iRoxx/jekyll,rovrevik/jekyll,adilapapaya/jekyll,derekgottlieb/jekyll,pmarsceill/jekyll,richsoni/jekyll,ramoslin02/jekyll,akoeplinger/jekyll,shliujing/jekyll,likong/jekyll,tobscure/jekyll,thejameskyle/jekyll,schaazzz/jekyll,trungvothanh/jekyll,AnanthaRajuC/jekyll,Teino1978-Corp/Teino1978-Corp-jekyll,xantage/jekyll,zhangkuaiji/jekyllcn,AaronSikes/jekyll,liukaijv/jekyll,jekyll/jekyll,monxim/monxim.github.io,jmepg/jekyll,jmhardison/jekyll,richsoni/jekyll,fengsmith/jekyll,FlyingWHR/jekyll,SQS2/Test,xantage/jekyll,jmhardison/jekyll,mrb/jekyll,martynbm/jekyll,mixxmac/jekyll,zhangkuaiji/jekyllcn,QuinntyneBrown/jekyll,ReachingOut/jekyll,aarvay/jekyll,darwin/jekyll,jmptrader/jekyll,likong/jekyll,xiaoshaozi52/jekyll,rlugojr/jekyll,jekyll/jekyll,nemotan/jekyll,gencer/jekyll,xcatliu/jekyllcn,alex-kovac/jekyll,ryanshaw/jekyll,codeclimate-testing/jekyll,derekgottlieb/jekyll,abhilashhb/jekyll,kimeng/jekyll,ZainRizvi/jekyll,ducktyper/jekyll,isathish/jekyll,desidude03/jekyll,saitodisse/jekyll,pheuko/jekyll,cyberid41/jekyll,kuangyeheng/jekyll,alihalabyah/jekyll,jeffkole/jekyll,hartmel/jekyll,m2candre/jekyll,leichunxin/jekyll,xiebinhqy/jklly_china,shuber2/jekyll,getandpost/jekyll.github.io,fulldecent/jekyll,xiebinhqy/jklly_china,foocoder/jekyll,thejameskyle/jekyll,goragod/jekyll,ajhit406/jekyll,penchan1218/jekyllcn,oresmus/jekyll,honger05/jekyllcn,schaazzz/jekyll,EddieDow/jekyll,wadaries/jekyll,tomasdiez/jekyll,zsyed91/jekyll,eninya/jekyll,angeliaz/jekyll,krahman/jekyll,trungvothanh/jekyll,vidbina/jekyll,drobati/jekyll,ls2uper/jekyll,howkj1/jekyll,johnnycastilho/jekyll,royalwang/jekyll,tamouse/jekyll,htmelvis/jekyll,cyberid41/jekyll,indraj/jekyll,pheuko/jekyll,pmarsceill/jekyll,foocoder/jekyll,eloyesp/jekyll,stomar/jekyll,xiaoshaozi52/jekyll,christophermanning/jekyll,ryanshaw/jekyll,marrujoalex/jekyll,dangaute/eng,matuzo/jekyll,Wirachmat/jekyll,anthonyrosengren/grasshoppergathering2.github-io,harrissoerja/jekyll,AnanthaRajuC/jekyll,Strangehill/jekyll,ramoslin02/jekyll,wentixiaogege/jekyll,LeuisKen/jekyllcn,chiyodad/jekyll,fulldecent/jekyll,yihangho/jekyll,vidbina/jekyll,tillgrallert/jekyll,LuoPX-15510486969/jekyll,floydpraveen/jekyll,zhangkuaiji/jekyllcn,Tyrion22/jekyll,Teino1978-Corp/jekyll,supriyantomaftuh/jekyll,noikiy/jekyll,floydpraveen/jekyll,Kinghack/kinghack.github.com,liukaijv/jekyll,hartmel/jekyll,chrisfinazzo/jekyll,saitodisse/jekyll,ryanshaw/jekyll,sideci-sample/sideci-sample-jekyll,ZDroid/jekyll,AnanthaRajuC/jekyll,tomjohnson1492/jekyll,fabulousu/jekyll,brint/jekyll,gencer/jekyll,Teino1978-Corp/Teino1978-Corp-jekyll,foocoder/jekyll,wentixiaogege/jekyll,noikiy/jekyll,imaustink/jekyll,tillgrallert/jekyll,hiteshsuthar/jekyll,princeofdarkness76/jekyll,CorainChicago/jekyll,aarvay/jekyll,thetaxman/jekyll,xiongjungit/jekyll,penchan1218/jekyllcn,CPVPLachlan/CPVP-Blog,jmknoll/jekyll,tillgrallert/jekyll,krahman/jekyll,eninya/jekyll,dangaute/eng,backendeveloper/jekyll,johnnycastilho/jekyll,daniel-beck/jekyll,marrujoalex/jekyll,xantage/jekyll,codeclimate-testing/jekyll,tobscure/jekyll,EddieDow/jekyll,nemotan/jekyll,garvitr/jekyll,tugberkugurlu/jekyll,jekyll/jekyll,chinayin/jekyll,mrb/jekyll,aarvay/jekyll,superve/jekyll,xcatliu/jekyllcn,codeclimate-testing/jekyll,x-way/jekyll,ajhit406/jekyll,dezon/jekyll,krishnakalyan3/jekyll,drobati/jekyll,nathanhorrigan1/webdeveloper,fulldecent/jekyll,anthonyrosengren/grasshoppergathering2.github-io,gaosboy/jekyll,Wirachmat/jekyll,eloyesp/jekyll,rajrathore/jekyll,PepSalehi/jekyll,sanxore/sanxore.github.com,harrissoerja/jekyll,gencer/jekyll,shuber2/jekyll,marrujoalex/jekyll,stomar/jekyll,CheekyFE/jekyll,18F/jekyll,AaronSikes/jekyll,hubsaysnuaa/jekyll,digideskio/jekyll,indraj/jekyll,tylermachen/jekyll,mrb/jekyll,kuangyeheng/jekyll,chinayin/jekyll,princeofdarkness76/jekyll,AtekiRyu/jekyll,rlugojr/jekyll,gencer/jekyll,jmptrader/jekyll,chrisfinazzo/jekyll,jmepg/jekyll,tomasdiez/jekyll,alex-kovac/jekyll,brint/jekyll,tareq-s/jekyll,ajhit406/jekyll,nemotan/jekyll,tareq-s/jekyll,thetaxman/jekyll,xtymichael/jekyll,digideskio/jekyll,rebornix/jekyll,chiyodad/jekyll,isathish/jekyll,ducktyper/jekyll,MauroMrod/jekyll,naughtyboy83/jekyll,penchan1218/jekyllcn,xtymichael/jekyll,darwin/jekyll,noikiy/jekyll,stomar/jekyll,yhironaka/yhironaka.github.io,jmepg/jekyll,kinlane/jekyll,garvitr/jekyll,alex-kovac/jekyll,doubleday/jekyll,dansef/jekyll,xiongjungit/jekyll,dansef/jekyll,x-way/jekyll,yihangho/jekyll,sasongkojati/jekyll,floydpraveen/jekyll,hartmel/jekyll,1gitGrey/jekyll,brint/jekyll,iRoxx/jekyll,chinayin/jekyll,gkunwar/gkunwar.github.io,jaroot32/jekyll,htmelvis/jekyll,mrb/jekyll,sanxore/sanxore.github.com,naughtyboy83/jekyll,FlyingWHR/jekyll,isathish/jekyll,larryfox/jekyll,shliujing/jekyll,lazycai/lazycai.github.com,hubsaysnuaa/jekyll,christophermanning/jekyll,FlyingWHR/jekyll,SQS2/Test,CorainChicago/jekyll,ZDroid/jekyll,ZDroid/jekyll,nickg33/jekyll,tomjohnson1492/jekyll,rlugojr/jekyll,gynter/jekyll,nasht00/jekyll,1gitGrey/jekyll,backendeveloper/jekyll,omeripek/jekyll,princeofdarkness76/jekyll,rovrevik/jekyll,supriyantomaftuh/jekyll,digideskio/jekyll,xtymichael/jekyll,CPVPLachlan/CPVP-Blog,Tyrion22/jekyll,richsoni/jekyll,EddieDow/jekyll,gkunwar/gkunwar.github.io,nateberkopec/jekyll,mixxmac/jekyll,desidude03/jekyll,abhilashhb/jekyll,CheekyFE/jekyll,derekgottlieb/jekyll,martynbm/jekyll,xcatliu/jekyllcn,18F/jekyll,bsmr-ruby/jekyll,bsmr-ruby/jekyll,egobrightan/jekyll,rasa2011/rasa2011.github.io,lazycai/lazycai.github.com,MjAbuz/jekyll,julienbourdeau/jekyll,rajrathore/jekyll,oresmus/jekyll,sasongkojati/jekyll,hubsaysnuaa/jekyll,ducktyper/jekyll,ZainRizvi/jekyll,m2candre/jekyll,dezon/jekyll,tomjohnson1492/jekyll,goragod/jekyll,honger05/jekyllcn,matuzo/jekyll,fengsmith/jekyll,akoeplinger/jekyll,tomasdiez/jekyll,howkj1/jekyll,gynter/jekyll,xiongjungit/jekyll,tylermachen/jekyll,CorainChicago/jekyll,jmptrader/jekyll,mnuessler/jekyll,noikiy/jekyll,nathanhorrigan1/webdeveloper,QuinntyneBrown/jekyll,rebornix/jekyll,superve/jekyll,egobrightan/jekyll,tillgrallert/jekyll,Tiger66639/jekyll,ewinkler/jekyll,alex-kovac/jekyll,tillgrallert/jekyll,sanxore/sanxore.github.com,tomjohnson1492/jekyll,ReachingOut/jekyll,jmknoll/jekyll,backendeveloper/jekyll,howkj1/jekyll,floydpraveen/jekyll,jmhardison/jekyll,ls2uper/jekyll,krahman/jekyll,18F/jekyll