Add a todo checklist for the pattern-matching feature.
Add a todo checklist for the pattern-matching feature.

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