Update README.md for System.IO.MemoryMappedFiles
Update README.md for System.IO.MemoryMappedFiles

benjamin-bader/corefx,Chrisboh/corefx,DnlHarvey/corefx,fernando-rodriguez/corefx,dkorolev/corefx,mellinoe/corefx,jlin177/corefx,elijah6/corefx,MaggieTsang/corefx,ericstj/corefx,comdiv/corefx,JosephTremoulet/corefx,khdang/corefx,Ermiar/corefx,Chrisboh/corefx,yizhang82/corefx,SGuyGe/corefx,weltkante/corefx,lggomez/corefx,ellismg/corefx,mafiya69/corefx,mafiya69/corefx,lydonchandra/corefx,CloudLens/corefx,zmaruo/corefx,ViktorHofer/corefx,stone-li/corefx,spoiledsport/corefx,gregg-miskelly/corefx,ellismg/corefx,ericstj/corefx,mellinoe/corefx,pallavit/corefx,chenxizhang/corefx,stephenmichaelf/corefx,alexandrnikitin/corefx,dotnet-bot/corefx,arronei/corefx,ravimeda/corefx,destinyclown/corefx,dkorolev/corefx,twsouthwick/corefx,YoupHulsebos/corefx,chaitrakeshav/corefx,jeremymeng/corefx,kkurni/corefx,dhoehna/corefx,gregg-miskelly/corefx,690486439/corefx,stone-li/corefx,dsplaisted/corefx,josguil/corefx,vs-team/corefx,cartermp/corefx,marksmeltzer/corefx,zhenlan/corefx,popolan1986/corefx,zhenlan/corefx,stephenmichaelf/corefx,Jiayili1/corefx,bpschoch/corefx,CloudLens/corefx,mmitche/corefx,dotnet-bot/corefx,s0ne0me/corefx,lydonchandra/corefx,mokchhya/corefx,marksmeltzer/corefx,rajansingh10/corefx,elijah6/corefx,Winsto/corefx,the-dwyer/corefx,spoiledsport/corefx,parjong/corefx,pgavlin/corefx,manu-silicon/corefx,janhenke/corefx,shimingsg/corefx,jhendrixMSFT/corefx,tijoytom/corefx,nbarbettini/corefx,kyulee1/corefx,Petermarcu/corefx,benpye/corefx,tijoytom/corefx,jlin177/corefx,pgavlin/corefx,seanshpark/corefx,stephenmichaelf/corefx,nbarbettini/corefx,krytarowski/corefx,shmao/corefx,pallavit/corefx,manu-silicon/corefx,alphonsekurian/corefx,chaitrakeshav/corefx,PatrickMcDonald/corefx,YoupHulsebos/corefx,vidhya-bv/corefx-sorting,alphonsekurian/corefx,weltkante/corefx,benpye/corefx,shana/corefx,khdang/corefx,jeremymeng/corefx,Ermiar/corefx,s0ne0me/corefx,nelsonsar/corefx,comdiv/corefx,shrutigarg/corefx,ptoonen/corefx,mellinoe/corefx,vijaykota/corefx,Frank125/corefx,wtgodbe/corefx,cartermp/corefx,Priya91/corefx-1,KrisLee/corefx,andyhebear/corefx,the-dwyer/corefx,richlander/corefx,dtrebbien/corefx,MaggieTsang/corefx,shahid-pk/corefx,SGuyGe/corefx,rjxby/corefx,jlin177/corefx,chenxizhang/corefx,popolan1986/corefx,cartermp/corefx,CherryCxldn/corefx,shiftkey-tester/corefx,krk/corefx,shana/corefx,ViktorHofer/corefx,vijaykota/corefx,rahku/corefx,alexperovich/corefx,jlin177/corefx,the-dwyer/corefx,lggomez/corefx,mellinoe/corefx,mellinoe/corefx,mmitche/corefx,shrutigarg/corefx,rahku/corefx,Priya91/corefx-1,andyhebear/corefx,axelheer/corefx,Jiayili1/corefx,EverlessDrop41/corefx,iamjasonp/corefx,Priya91/corefx-1,the-dwyer/corefx,gabrielPeart/corefx,mokchhya/corefx,Alcaro/corefx,tijoytom/corefx,krk/corefx,KrisLee/corefx,manu-silicon/corefx,viniciustaveira/corefx,kkurni/corefx,vidhya-bv/corefx-sorting,destinyclown/corefx,thiagodin/corefx,alphonsekurian/corefx,ericstj/corefx,Jiayili1/corefx,gabrielPeart/corefx,690486439/corefx,stormleoxia/corefx,pallavit/corefx,heXelium/corefx,zhenlan/corefx,heXelium/corefx,zhangwenquan/corefx,cartermp/corefx,shana/corefx,parjong/corefx,Ermiar/corefx,richlander/corefx,n1ghtmare/corefx,lggomez/corefx,gkhanna79/corefx,MaggieTsang/corefx,stormleoxia/corefx,lggomez/corefx,FiveTimesTheFun/corefx,parjong/corefx,shimingsg/corefx,vrassouli/corefx,tijoytom/corefx,tstringer/corefx,krk/corefx,seanshpark/corefx,stone-li/corefx,huanjie/corefx,stephenmichaelf/corefx,josguil/corefx,BrennanConroy/corefx,mazong1123/corefx,rahku/corefx,ptoonen/corefx,nchikanov/corefx,scott156/corefx,bpschoch/corefx,JosephTremoulet/corefx,Priya91/corefx-1,jhendrixMSFT/corefx,scott156/corefx,thiagodin/corefx,janhenke/corefx,jlin177/corefx,anjumrizwi/corefx,Winsto/corefx,stone-li/corefx,cnbin/corefx,rajansingh10/corefx,nchikanov/corefx,tijoytom/corefx,ViktorHofer/corefx,brett25/corefx,seanshpark/corefx,kkurni/corefx,manu-silicon/corefx,pgavlin/corefx,benjamin-bader/corefx,marksmeltzer/corefx,Yanjing123/corefx,ViktorHofer/corefx,dhoehna/corefx,mellinoe/corefx,ViktorHofer/corefx,khdang/corefx,alexandrnikitin/corefx,ravimeda/corefx,janhenke/corefx,shiftkey-tester/corefx,jlin177/corefx,akivafr123/corefx,DnlHarvey/corefx,yizhang82/corefx,claudelee/corefx,DnlHarvey/corefx,benpye/corefx,YoupHulsebos/corefx,parjong/corefx,nelsonsar/corefx,CherryCxldn/corefx,bitcrazed/corefx,tijoytom/corefx,vrassouli/corefx,dotnet-bot/corefx,jcme/corefx,janhenke/corefx,mmitche/corefx,the-dwyer/corefx,dtrebbien/corefx,JosephTremoulet/corefx,JosephTremoulet/corefx,axelheer/corefx,andyhebear/corefx,mokchhya/corefx,nelsonsar/corefx,Alcaro/corefx,shimingsg/corefx,mazong1123/corefx,axelheer/corefx,FiveTimesTheFun/corefx,krk/corefx,EverlessDrop41/corefx,rahku/corefx,matthubin/corefx,shmao/corefx,comdiv/corefx,alexperovich/corefx,wtgodbe/corefx,jhendrixMSFT/corefx,elijah6/corefx,gkhanna79/corefx,Frank125/corefx,ellismg/corefx,krk/corefx,marksmeltzer/corefx,twsouthwick/corefx,krk/corefx,jcme/corefx,weltkante/corefx,stephenmichaelf/corefx,cydhaselton/corefx,twsouthwick/corefx,shmao/corefx,pallavit/corefx,benpye/corefx,n1ghtmare/corefx,tstringer/corefx,alexperovich/corefx,dkorolev/corefx,benjamin-bader/corefx,YoupHulsebos/corefx,KrisLee/corefx,seanshpark/corefx,Jiayili1/corefx,yizhang82/corefx,iamjasonp/corefx,richlander/corefx,ptoonen/corefx,BrennanConroy/corefx,parjong/corefx,claudelee/corefx,bitcrazed/corefx,PatrickMcDonald/corefx,cartermp/corefx,VPashkov/corefx,YoupHulsebos/corefx,SGuyGe/corefx,lydonchandra/corefx,mmitche/corefx,shimingsg/corefx,claudelee/corefx,matthubin/corefx,chenkennt/corefx,krytarowski/corefx,vrassouli/corefx,billwert/corefx,krk/corefx,elijah6/corefx,n1ghtmare/corefx,lggomez/corefx,chaitrakeshav/corefx,benjamin-bader/corefx,SGuyGe/corefx,Yanjing123/corefx,cydhaselton/corefx,mokchhya/corefx,adamralph/corefx,Chrisboh/corefx,andyhebear/corefx,iamjasonp/corefx,mafiya69/corefx,pallavit/corefx,gregg-miskelly/corefx,nbarbettini/corefx,shmao/corefx,xuweixuwei/corefx,yizhang82/corefx,Ermiar/corefx,manu-silicon/corefx,manu-silicon/corefx,kyulee1/corefx,yizhang82/corefx,shahid-pk/corefx,twsouthwick/corefx,seanshpark/corefx,rjxby/corefx,SGuyGe/corefx,fernando-rodriguez/corefx,chenkennt/corefx,shmao/corefx,iamjasonp/corefx,wtgodbe/corefx,xuweixuwei/corefx,DnlHarvey/corefx,alphonsekurian/corefx,jeremymeng/corefx,marksmeltzer/corefx,akivafr123/corefx,gkhanna79/corefx,690486439/corefx,rjxby/corefx,dsplaisted/corefx,jcme/corefx,anjumrizwi/corefx,vidhya-bv/corefx-sorting,iamjasonp/corefx,Yanjing123/corefx,rjxby/corefx,Frank125/corefx,690486439/corefx,DnlHarvey/corefx,mafiya69/corefx,VPashkov/corefx,lydonchandra/corefx,jhendrixMSFT/corefx,huanjie/corefx,dkorolev/corefx,Alcaro/corefx,jhendrixMSFT/corefx,arronei/corefx,rahku/corefx,ellismg/corefx,cydhaselton/corefx,dsplaisted/corefx,oceanho/corefx,oceanho/corefx,krytarowski/corefx,zmaruo/corefx,Winsto/corefx,pgavlin/corefx,scott156/corefx,ViktorHofer/corefx,CloudLens/corefx,ptoonen/corefx,tstringer/corefx,marksmeltzer/corefx,lggomez/corefx,vijaykota/corefx,SGuyGe/corefx,ericstj/corefx,rahku/corefx,vidhya-bv/corefx-sorting,dtrebbien/corefx,Jiayili1/corefx,spoiledsport/corefx,ravimeda/corefx,akivafr123/corefx,Petermarcu/corefx,jlin177/corefx,krytarowski/corefx,mazong1123/corefx,shahid-pk/corefx,misterzik/corefx,wtgodbe/corefx,cnbin/corefx,matthubin/corefx,arronei/corefx,khdang/corefx,cartermp/corefx,larsbj1988/corefx,erpframework/corefx,dhoehna/corefx,claudelee/corefx,huanjie/corefx,pallavit/corefx,the-dwyer/corefx,kyulee1/corefx,fffej/corefx,MaggieTsang/corefx,Petermarcu/corefx,Priya91/corefx-1,gkhanna79/corefx,mafiya69/corefx,Yanjing123/corefx,cydhaselton/corefx,alexandrnikitin/corefx,shiftkey-tester/corefx,uhaciogullari/corefx,mazong1123/corefx,fgreinacher/corefx,billwert/corefx,vs-team/corefx,VPashkov/corefx,elijah6/corefx,uhaciogullari/corefx,dhoehna/corefx,tstringer/corefx,tijoytom/corefx,elijah6/corefx,ericstj/corefx,rubo/corefx,zmaruo/corefx,elijah6/corefx,richlander/corefx,larsbj1988/corefx,parjong/corefx,MaggieTsang/corefx,krytarowski/corefx,nchikanov/corefx,adamralph/corefx,jmhardison/corefx,fernando-rodriguez/corefx,bpschoch/corefx,thiagodin/corefx,mmitche/corefx,jcme/corefx,Ermiar/corefx,gkhanna79/corefx,benpye/corefx,alphonsekurian/corefx,alexperovich/corefx,nbarbettini/corefx,gabrielPeart/corefx,jeremymeng/corefx,brett25/corefx,viniciustaveira/corefx,vs-team/corefx,Alcaro/corefx,cydhaselton/corefx,fffej/corefx,Petermarcu/corefx,mazong1123/corefx,seanshpark/corefx,erpframework/corefx,bpschoch/corefx,akivafr123/corefx,zhenlan/corefx,chaitrakeshav/corefx,alexandrnikitin/corefx,stephenmichaelf/corefx,weltkante/corefx,MaggieTsang/corefx,zhenlan/corefx,cnbin/corefx,parjong/corefx,akivafr123/corefx,erpframework/corefx,stormleoxia/corefx,misterzik/corefx,shrutigarg/corefx,anjumrizwi/corefx,mazong1123/corefx,Jiayili1/corefx,weltkante/corefx,mafiya69/corefx,mmitche/corefx,shimingsg/corefx,thiagodin/corefx,nchikanov/corefx,alphonsekurian/corefx,nchikanov/corefx,YoupHulsebos/corefx,bitcrazed/corefx,vidhya-bv/corefx-sorting,brett25/corefx,benjamin-bader/corefx,rubo/corefx,alexperovich/corefx,DnlHarvey/corefx,oceanho/corefx,ptoonen/corefx,nbarbettini/corefx,chenkennt/corefx,n1ghtmare/corefx,brett25/corefx,shmao/corefx,CherryCxldn/corefx,wtgodbe/corefx,MaggieTsang/corefx,khdang/corefx,shahid-pk/corefx,iamjasonp/corefx,billwert/corefx,gregg-miskelly/corefx,twsouthwick/corefx,Petermarcu/corefx,billwert/corefx,zhenlan/corefx,iamjasonp/corefx,jcme/corefx,ericstj/corefx,bitcrazed/corefx,krytarowski/corefx,jmhardison/corefx,JosephTremoulet/corefx,fgreinacher/corefx,kkurni/corefx,mazong1123/corefx,kyulee1/corefx,shahid-pk/corefx,kkurni/corefx,Priya91/corefx-1,Petermarcu/corefx,uhaciogullari/corefx,ravimeda/corefx,jcme/corefx,fgreinacher/corefx,popolan1986/corefx,CloudLens/corefx,axelheer/corefx,josguil/corefx,dotnet-bot/corefx,dhoehna/corefx,ellismg/corefx,josguil/corefx,alexandrnikitin/corefx,dhoehna/corefx,matthubin/corefx,larsbj1988/corefx,Frank125/corefx,wtgodbe/corefx,n1ghtmare/corefx,shiftkey-tester/corefx,shrutigarg/corefx,mmitche/corefx,josguil/corefx,adamralph/corefx,Jiayili1/corefx,ravimeda/corefx,benjamin-bader/corefx,richlander/corefx,Ermiar/corefx,twsouthwick/corefx,twsouthwick/corefx,s0ne0me/corefx,rjxby/corefx,jhendrixMSFT/corefx,gkhanna79/corefx,rajansingh10/corefx,fffej/corefx,rubo/corefx,rjxby/corefx,dotnet-bot/corefx,vrassouli/corefx,KrisLee/corefx,CherryCxldn/corefx,gkhanna79/corefx,khdang/corefx,Chrisboh/corefx,weltkante/corefx,JosephTremoulet/corefx,billwert/corefx,stone-li/corefx,rahku/corefx,billwert/corefx,stone-li/corefx,the-dwyer/corefx,JosephTremoulet/corefx,weltkante/corefx,rubo/corefx,mokchhya/corefx,yizhang82/corefx,rjxby/corefx,scott156/corefx,Petermarcu/corefx,heXelium/corefx,huanjie/corefx,nelsonsar/corefx,rajansingh10/corefx,690486439/corefx,zhenlan/corefx,nchikanov/corefx,dotnet-bot/corefx,axelheer/corefx,ptoonen/corefx,shimingsg/corefx,krytarowski/corefx,nbarbettini/corefx,ravimeda/corefx,Chrisboh/corefx,chenxizhang/corefx,YoupHulsebos/corefx,oceanho/corefx,stormleoxia/corefx,alphonsekurian/corefx,alexperovich/corefx,zhangwenquan/corefx,shahid-pk/corefx,mokchhya/corefx,PatrickMcDonald/corefx,comdiv/corefx,nbarbettini/corefx,viniciustaveira/corefx,jhendrixMSFT/corefx,heXelium/corefx,dotnet-bot/corefx,dtrebbien/corefx,ericstj/corefx,rubo/corefx,anjumrizwi/corefx,janhenke/corefx,axelheer/corefx,tstringer/corefx,richlander/corefx,uhaciogullari/corefx,stephenmichaelf/corefx,seanshpark/corefx,FiveTimesTheFun/corefx,ViktorHofer/corefx,Yanjing123/corefx,zhangwenquan/corefx,Chrisboh/corefx,kkurni/corefx,janhenke/corefx,lggomez/corefx,wtgodbe/corefx,shmao/corefx,manu-silicon/corefx,vs-team/corefx,cydhaselton/corefx,ellismg/corefx,Ermiar/corefx,dhoehna/corefx,josguil/corefx,benpye/corefx,bitcrazed/corefx,billwert/corefx,destinyclown/corefx,jmhardison/corefx,richlander/corefx,shana/corefx,tstringer/corefx,shimingsg/corefx,ravimeda/corefx,DnlHarvey/corefx,zmaruo/corefx,nchikanov/corefx,marksmeltzer/corefx,ptoonen/corefx,larsbj1988/corefx,viniciustaveira/corefx,jmhardison/corefx,stone-li/corefx,VPashkov/corefx,zhangwenquan/corefx,yizhang82/corefx,cydhaselton/corefx,EverlessDrop41/corefx,xuweixuwei/corefx,fgreinacher/corefx,gabrielPeart/corefx,jeremymeng/corefx,s0ne0me/corefx,PatrickMcDonald/corefx,BrennanConroy/corefx,fffej/corefx,misterzik/corefx,alexperovich/corefx,PatrickMcDonald/corefx,erpframework/corefx,cnbin/corefx