Update the doc to clarify that language design is iterative
Update the doc to clarify that language design is iterative

mattscheffer/roslyn,MattWindsor91/roslyn,mmitche/roslyn,dotnet/roslyn,khyperia/roslyn,Pvlerick/roslyn,bartdesmet/roslyn,HellBrick/roslyn,abock/roslyn,tvand7093/roslyn,yeaicc/roslyn,CyrusNajmabadi/roslyn,OmarTawfik/roslyn,jkotas/roslyn,MattWindsor91/roslyn,swaroop-sridhar/roslyn,khyperia/roslyn,KiloBravoLima/roslyn,rgani/roslyn,mattwar/roslyn,amcasey/roslyn,KiloBravoLima/roslyn,jhendrixMSFT/roslyn,diryboy/roslyn,pdelvo/roslyn,bkoelman/roslyn,brettfo/roslyn,Hosch250/roslyn,yeaicc/roslyn,KevinH-MS/roslyn,VSadov/roslyn,Maxwe11/roslyn,thomaslevesque/roslyn,weltkante/roslyn,drognanar/roslyn,jamesqo/roslyn,OmarTawfik/roslyn,jeffanders/roslyn,swaroop-sridhar/roslyn,Shiney/roslyn,natgla/roslyn,xasx/roslyn,michalhosala/roslyn,mavasani/roslyn,drognanar/roslyn,jcouv/roslyn,SeriaWei/roslyn,ljw1004/roslyn,HellBrick/roslyn,lorcanmooney/roslyn,eriawan/roslyn,bartdesmet/roslyn,eriawan/roslyn,nguerrera/roslyn,Pvlerick/roslyn,DustinCampbell/roslyn,vcsjones/roslyn,heejaechang/roslyn,sharadagrawal/Roslyn,bbarry/roslyn,xasx/roslyn,bartdesmet/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,ljw1004/roslyn,DustinCampbell/roslyn,ljw1004/roslyn,amcasey/roslyn,AlekseyTs/roslyn,Giftednewt/roslyn,mgoertz-msft/roslyn,MattWindsor91/roslyn,budcribar/roslyn,mavasani/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,natgla/roslyn,SeriaWei/roslyn,michalhosala/roslyn,AnthonyDGreen/roslyn,zooba/roslyn,zooba/roslyn,AnthonyDGreen/roslyn,srivatsn/roslyn,KirillOsenkov/roslyn,natidea/roslyn,jaredpar/roslyn,mattscheffer/roslyn,tmeschter/roslyn,budcribar/roslyn,reaction1989/roslyn,shyamnamboodiripad/roslyn,Giftednewt/roslyn,tmat/roslyn,physhi/roslyn,tannergooding/roslyn,jaredpar/roslyn,abock/roslyn,stephentoub/roslyn,KevinH-MS/roslyn,AlekseyTs/roslyn,davkean/roslyn,michalhosala/roslyn,dpoeschl/roslyn,KevinRansom/roslyn,bbarry/roslyn,AlekseyTs/roslyn,mmitche/roslyn,managed-commons/roslyn,gafter/roslyn,xoofx/roslyn,agocke/roslyn,tvand7093/roslyn,SeriaWei/roslyn,diryboy/roslyn,CyrusNajmabadi/roslyn,jkotas/roslyn,AArnott/roslyn,panopticoncentral/roslyn,vcsjones/roslyn,lorcanmooney/roslyn,kelltrick/roslyn,paulvanbrenk/roslyn,jcouv/roslyn,srivatsn/roslyn,dotnet/roslyn,basoundr/roslyn,KevinRansom/roslyn,gafter/roslyn,DustinCampbell/roslyn,CyrusNajmabadi/roslyn,pdelvo/roslyn,yeaicc/roslyn,VSadov/roslyn,cston/roslyn,khyperia/roslyn,ValentinRueda/roslyn,mgoertz-msft/roslyn,mattscheffer/roslyn,balajikris/roslyn,jaredpar/roslyn,weltkante/roslyn,Giftednewt/roslyn,aelij/roslyn,MichalStrehovsky/roslyn,lorcanmooney/roslyn,jeffanders/roslyn,swaroop-sridhar/roslyn,MichalStrehovsky/roslyn,ValentinRueda/roslyn,rgani/roslyn,tmat/roslyn,tmeschter/roslyn,mattwar/roslyn,AArnott/roslyn,cston/roslyn,orthoxerox/roslyn,reaction1989/roslyn,physhi/roslyn,managed-commons/roslyn,brettfo/roslyn,xasx/roslyn,CaptainHayashi/roslyn,eriawan/roslyn,balajikris/roslyn,Maxwe11/roslyn,AArnott/roslyn,natidea/roslyn,weltkante/roslyn,vslsnap/roslyn,MatthieuMEZIL/roslyn,ErikSchierboom/roslyn,kelltrick/roslyn,xoofx/roslyn,Pvlerick/roslyn,MattWindsor91/roslyn,jkotas/roslyn,nguerrera/roslyn,pdelvo/roslyn,KiloBravoLima/roslyn,VSadov/roslyn,reaction1989/roslyn,gafter/roslyn,srivatsn/roslyn,Hosch250/roslyn,ErikSchierboom/roslyn,jmarolf/roslyn,AmadeusW/roslyn,leppie/roslyn,bkoelman/roslyn,Shiney/roslyn,AmadeusW/roslyn,ValentinRueda/roslyn,panopticoncentral/roslyn,akrisiun/roslyn,mattwar/roslyn,budcribar/roslyn,stephentoub/roslyn,robinsedlaczek/roslyn,wvdd007/roslyn,basoundr/roslyn,diryboy/roslyn,davkean/roslyn,khellang/roslyn,vcsjones/roslyn,Shiney/roslyn,sharadagrawal/Roslyn,heejaechang/roslyn,orthoxerox/roslyn,genlu/roslyn,ericfe-ms/roslyn,KirillOsenkov/roslyn,akrisiun/roslyn,MichalStrehovsky/roslyn,CaptainHayashi/roslyn,vslsnap/roslyn,MatthieuMEZIL/roslyn,mavasani/roslyn,paulvanbrenk/roslyn,sharwell/roslyn,bbarry/roslyn,tvand7093/roslyn,mgoertz-msft/roslyn,wvdd007/roslyn,basoundr/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,agocke/roslyn,tmeschter/roslyn,dotnet/roslyn,Maxwe11/roslyn,heejaechang/roslyn,HellBrick/roslyn,rgani/roslyn,robinsedlaczek/roslyn,jmarolf/roslyn,jasonmalinowski/roslyn,genlu/roslyn,brettfo/roslyn,jcouv/roslyn,antonssonj/roslyn,khellang/roslyn,TyOverby/roslyn,KevinRansom/roslyn,khellang/roslyn,tmat/roslyn,aelij/roslyn,drognanar/roslyn,jhendrixMSFT/roslyn,leppie/roslyn,ericfe-ms/roslyn,vslsnap/roslyn,orthoxerox/roslyn,TyOverby/roslyn,nguerrera/roslyn,jeffanders/roslyn,akrisiun/roslyn,balajikris/roslyn,a-ctor/roslyn,jmarolf/roslyn,physhi/roslyn,antonssonj/roslyn,sharwell/roslyn,antonssonj/roslyn,ErikSchierboom/roslyn,dpoeschl/roslyn,stephentoub/roslyn,sharwell/roslyn,wvdd007/roslyn,natidea/roslyn,leppie/roslyn,a-ctor/roslyn,jamesqo/roslyn,aelij/roslyn,abock/roslyn,genlu/roslyn,KevinH-MS/roslyn,xoofx/roslyn,kelltrick/roslyn,panopticoncentral/roslyn,jasonmalinowski/roslyn,shyamnamboodiripad/roslyn,Hosch250/roslyn,jamesqo/roslyn,AmadeusW/roslyn,paulvanbrenk/roslyn,shyamnamboodiripad/roslyn,tannergooding/roslyn,CaptainHayashi/roslyn,jasonmalinowski/roslyn,dpoeschl/roslyn,OmarTawfik/roslyn,natgla/roslyn,managed-commons/roslyn,amcasey/roslyn,bkoelman/roslyn,TyOverby/roslyn,zooba/roslyn,jhendrixMSFT/roslyn,thomaslevesque/roslyn,sharadagrawal/Roslyn,agocke/roslyn,davkean/roslyn,KirillOsenkov/roslyn,cston/roslyn,ericfe-ms/roslyn,AnthonyDGreen/roslyn,a-ctor/roslyn,tannergooding/roslyn,MatthieuMEZIL/roslyn,robinsedlaczek/roslyn,mmitche/roslyn,thomaslevesque/roslyn