Don't send HTML on post save.
Don't send HTML on post save.

fixes #3956
- adjusts post serialiser to not send HTML content

Aaron1992/Ghost,pensierinmusica/Ghost,kortemy/Ghost,allanjsx/Ghost,anijap/PhotoGhost,LeandroNascimento/Ghost,javorszky/Ghost,makapen/Ghost,gleneivey/Ghost,jiangjian-zh/Ghost,JonSmith/Ghost,lukw00/Ghost,mattchupp/blog,anijap/PhotoGhost,ClarkGH/Ghost,phillipalexander/Ghost,dggr/Ghost-sr,PDXIII/Ghost-FormMailer,sergeylukin/Ghost,rollokb/Ghost,liftup/ghost,ErisDS/Ghost,bbmepic/Ghost,thinq4yourself/Unmistakable-Blog,lethalbrains/Ghost,etanxing/Ghost,icowan/Ghost,Xibao-Lv/Ghost,ITJesse/Ghost-zh,YY030913/Ghost,yundt/seisenpenji,aexmachina/blog-old,DesenTao/Ghost,sceltoas/Ghost,DesenTao/Ghost,nneko/Ghost,influitive/crafters,sankumsek/Ghost-ashram,NikolaiIvanov/Ghost,MadeOnMars/Ghost,Japh/Ghost,ryansukale/ux.ryansukale.com,handcode7/Ghost,cobbspur/Ghost,mohanambati/Ghost,javimolla/Ghost,makapen/Ghost,schneidmaster/theventriloquist.us,mtvillwock/Ghost,jparyani/GhostSS,sunh3/Ghost,nneko/Ghost,flomotlik/Ghost,yangli1990/Ghost,dqj/Ghost,Sebastian1011/Ghost,KnowLoading/Ghost,AlexKVal/Ghost,vloom/blog,bastianbin/Ghost,imjerrybao/Ghost,Brunation11/Ghost,arvidsvensson/Ghost,alexandrachifor/Ghost,sfpgmr/Ghost,woodyrew/Ghost,jaswilli/Ghost,ineitzke/Ghost,aroneiermann/GhostJade,prosenjit-itobuz/Ghost,disordinary/Ghost,mayconxhh/Ghost,chris-yoon90/Ghost,load11/ghost,benstoltz/Ghost,bbmepic/Ghost,Trendy/Ghost,theonlypat/Ghost,NovaDevelopGroup/Academy,tksander/Ghost,wemakeweb/Ghost,riyadhalnur/Ghost,lanffy/Ghost,lf2941270/Ghost,ygbhf/Ghost,allanjsx/Ghost,fredeerock/atlabghost,NovaDevelopGroup/Academy,mlabieniec/ghost-env,jacostag/Ghost,neynah/GhostSS,greyhwndz/Ghost,acburdine/Ghost,cncodog/Ghost-zh-codog,julianromera/Ghost,davidmenger/nodejsfan,ballPointPenguin/Ghost,bisoe/Ghost,JohnONolan/Ghost,optikalefx/Ghost,NamedGod/Ghost,johnnymitch/Ghost,ignasbernotas/nullifer,jparyani/GhostSS,ghostchina/Ghost-zh,ashishapy/ghostpy,patterncoder/patterncoder,netputer/Ghost,davidenq/Ghost-Blog,BlueHatbRit/Ghost,duyetdev/islab,edsadr/Ghost,olsio/Ghost,gcamana/Ghost,mohanambati/Ghost,cysys/ghost-openshift,imjerrybao/Ghost,sebgie/Ghost,Jai-Chaudhary/Ghost,delgermurun/Ghost,Kikobeats/Ghost,JonathanZWhite/Ghost,etdev/blog,NamedGod/Ghost,daihuaye/Ghost,gabfssilva/Ghost,johngeorgewright/blog.j-g-w.info,jomofrodo/ccb-ghost,cncodog/Ghost-zh-codog,mnitchie/Ghost,jomofrodo/ccb-ghost,pedroha/Ghost,diogogmt/Ghost,PaulBGD/Ghost-Plus,dymx101/Ghost,GroupxDev/javaPress,wangjun/Ghost,leonli/ghost,UsmanJ/Ghost,camilodelvasto/localghost,tadityar/Ghost,jorgegilmoreira/ghost,dYale/blog,tmp-reg/Ghost,edurangel/Ghost,jamesslock/Ghost,YY030913/Ghost,trunk-studio/Ghost,laispace/laiblog,PDXIII/Ghost-FormMailer,rmoorman/Ghost,ericbenson/GhostAzureSetup,cwonrails/Ghost,MadeOnMars/Ghost,e10/Ghost,optikalefx/Ghost,katiefenn/Ghost,andrewconnell/Ghost,rameshponnada/Ghost,zhiyishou/Ghost,letsjustfixit/Ghost,cncodog/Ghost-zh-codog,pathayes/FoodBlog,ananthhh/Ghost,ignasbernotas/nullifer,zhiyishou/Ghost,janvt/Ghost,Alxandr/Blog,davidmenger/nodejsfan,exsodus3249/Ghost,sebgie/Ghost,praveenscience/Ghost,carlosmtx/Ghost,SachaG/bjjbot-blog,Rovak/Ghost,llv22/Ghost,llv22/Ghost,virtuallyearthed/Ghost,diancloud/Ghost,atandon/Ghost,djensen47/Ghost,schematical/Ghost,sfpgmr/Ghost,hnq90/Ghost,shannonshsu/Ghost,letsjustfixit/Ghost,trepafi/ghost-base,lanffy/Ghost,tuan/Ghost,Shauky/Ghost,diancloud/Ghost,r14r/fork_nodejs_ghost,vainglori0us/urban-fortnight,kmeurer/GhostAzureSetup,johnnymitch/Ghost,velimir0xff/Ghost,cicorias/Ghost,zeropaper/Ghost,atandon/Ghost,mdbw/ghost,jacostag/Ghost,ngosinafrica/SiteForNGOs,JohnONolan/Ghost,bosung90/Ghost,SkynetInc/steam,smedrano/Ghost,ClarkGH/Ghost,PepijnSenders/whatsontheotherside,TryGhost/Ghost,lukaszklis/Ghost,ashishapy/ghostpy,jeonghwan-kim/Ghost,sergeylukin/Ghost,diogogmt/Ghost,ryanbrunner/crafters,floofydoug/Ghost,dbalders/Ghost,ananthhh/Ghost,memezilla/Ghost,Polyrhythm/dolce,adam-paterson/blog,yanntech/Ghost,floofydoug/Ghost,pathayes/FoodBlog,akveo/akveo-blog,ASwitlyk/Ghost,kolorahl/Ghost,duyetdev/islab,tanbo800/Ghost,camilodelvasto/herokughost,andrewconnell/Ghost,francisco-filho/Ghost,akveo/akveo-blog,javimolla/Ghost,TribeMedia/Ghost,FredericBernardo/Ghost,vainglori0us/urban-fortnight,karmakaze/Ghost,Kaenn/Ghost,djensen47/Ghost,jaswilli/Ghost,lowkeyfred/Ghost,v3rt1go/Ghost,ErisDS/Ghost,acburdine/Ghost,Romdeau/Ghost,theonlypat/Ghost,Smile42RU/Ghost,ryanbrunner/crafters,daimaqiao/Ghost-Bridge,JonathanZWhite/Ghost,zeropaper/Ghost,schematical/Ghost,Remchi/Ghost,qdk0901/Ghost,flomotlik/Ghost,mlabieniec/ghost-env,ivanoats/ivanstorck.com,pbevin/Ghost,jamesslock/Ghost,hnarayanan/narayanan.co,PaulBGD/Ghost-Plus,lukekhamilton/Ghost,shannonshsu/Ghost,smaty1/Ghost,dgem/Ghost,AlexKVal/Ghost,sajmoon/Ghost,dylanchernick/ghostblog,Rovak/Ghost,ManRueda/manrueda-blog,axross/ghost,shrimpy/Ghost,rouanw/Ghost,rollokb/Ghost,dbalders/Ghost,edsadr/Ghost,novaugust/Ghost,carlyledavis/Ghost,Coding-House/Ghost,allanjsx/Ghost,BayPhillips/Ghost,rito/Ghost,davidenq/Ghost-Blog,sangcu/Ghost,kolorahl/Ghost,acburdine/Ghost,devleague/uber-hackathon,neynah/GhostSS,JonSmith/Ghost,daimaqiao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zackslash/Ghost,lowkeyfred/Ghost,telco2011/Ghost,Bunk/Ghost,kevinansfield/Ghost,singular78/Ghost,lcamacho/Ghost,UsmanJ/Ghost,madole/diverse-learners,rameshponnada/Ghost,ddeveloperr/Ghost,katrotz/blog.katrotz.space,Xibao-Lv/Ghost,bisoe/Ghost,GarrethDottin/Habits-Design,lukaszklis/Ghost,mhhf/ghost-latex,Kikobeats/Ghost,riyadhalnur/Ghost,SachaG/bjjbot-blog,STANAPO/Ghost,jomahoney/Ghost,obsoleted/Ghost,Yarov/yarov,yanntech/Ghost,hoxoa/Ghost,melissaroman/ghost-blog,e10/Ghost,ManRueda/Ghost,klinker-apps/ghost,TryGhost/Ghost,IbrahimAmin/Ghost,darvelo/Ghost,Feitianyuan/Ghost,telco2011/Ghost,denzelwamburu/denzel.xyz,VillainyStudios/Ghost,pensierinmusica/Ghost,zackslash/Ghost,darvelo/Ghost,wemakeweb/Ghost,lukw00/Ghost,Romdeau/Ghost,liftup/ghost,greenboxindonesia/Ghost,vloom/blog,codeincarnate/Ghost,thehogfather/Ghost,trunk-studio/Ghost,KnowLoading/Ghost,notno/Ghost,ladislas/ghost,Elektro1776/javaPress,dai-shi/Ghost,woodyrew/Ghost,disordinary/Ghost,ThorstenHans/Ghost,leonli/ghost,jgladch/taskworksource,syaiful6/Ghost,dymx101/Ghost,novaugust/Ghost,ljhsai/Ghost,dqj/Ghost,AnthonyCorrado/Ghost,ljhsai/Ghost,tadityar/Ghost,psychobunny/Ghost,yangli1990/Ghost,ericbenson/GhostAzureSetup,jomofrodo/ccb-ghost,Kikobeats/Ghost,Smile42RU/Ghost,madole/diverse-learners,ivantedja/ghost,thinq4yourself/Unmistakable-Blog,jiangjian-zh/Ghost,prosenjit-itobuz/Ghost,developer-prosenjit/Ghost,cqricky/Ghost,omaracrystal/Ghost,gleneivey/Ghost,GarrethDottin/Habits-Design,flpms/ghost-ad,jiachenning/Ghost,skmezanul/Ghost,carlosmtx/Ghost,TribeMedia/Ghost,lf2941270/Ghost,dai-shi/Ghost,etdev/blog,julianromera/Ghost,blankmaker/Ghost,r1N0Xmk2/Ghost,Alxandr/Blog,neynah/GhostSS,netputer/Ghost,dggr/Ghost-sr,GroupxDev/javaPress,situkangsayur/Ghost,francisco-filho/Ghost,UnbounDev/Ghost,bsansouci/Ghost,rizkyario/Ghost,jeonghwan-kim/Ghost,PeterCxy/Ghost,ghostchina/Ghost-zh,gabfssilva/Ghost,leninhasda/Ghost,UnbounDev/Ghost,InnoD-WebTier/hardboiled_ghost,leninhasda/Ghost,johngeorgewright/blog.j-g-w.info,axross/ghost,Kaenn/Ghost,barbastan/Ghost,bitjson/Ghost,NodeJSBarenko/Ghost,MrMaksimize/sdg1,javorszky/Ghost,ddeveloperr/Ghost,kaiqigong/Ghost,ThorstenHans/Ghost,janvt/Ghost