ci: Add appveyor.yml to build on MSVC
ci: Add appveyor.yml to build on MSVC

jtimon/bitcoin,MeshCollider/bitcoin,myriadteam/myriadcoin,particl/particl-core,mm-s/bitcoin,qtumproject/qtum,pstratem/bitcoin,ahmedbodi/vertcoin,rnicoll/bitcoin,jonasschnelli/bitcoin,yenliangl/bitcoin,rnicoll/bitcoin,JeremyRubin/bitcoin,instagibbs/bitcoin,ahmedbodi/vertcoin,bespike/litecoin,qtumproject/qtum,droark/bitcoin,qtumproject/qtum,instagibbs/bitcoin,mm-s/bitcoin,Christewart/bitcoin,tecnovert/particl-core,namecoin/namecore,MarcoFalke/bitcoin,kallewoof/bitcoin,MeshCollider/bitcoin,sipsorcery/bitcoin,namecoin/namecore,pataquets/namecoin-core,Xekyo/bitcoin,GlobalBoost/GlobalBoost,r8921039/bitcoin,anditto/bitcoin,Kogser/bitcoin,ajtowns/bitcoin,particl/particl-core,DigitalPandacoin/pandacoin,EthanHeilman/bitcoin,tjps/bitcoin,sipsorcery/bitcoin,MeshCollider/bitcoin,domob1812/bitcoin,ElementsProject/elements,particl/particl-core,tjps/bitcoin,vertcoin/vertcoin,fanquake/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,droark/bitcoin,Kogser/bitcoin,fujicoin/fujicoin,r8921039/bitcoin,ajtowns/bitcoin,domob1812/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,anditto/bitcoin,droark/bitcoin,MarcoFalke/bitcoin,afk11/bitcoin,ericshawlinux/bitcoin,apoelstra/bitcoin,jnewbery/bitcoin,jonasschnelli/bitcoin,Sjors/bitcoin,jambolo/bitcoin,prusnak/bitcoin,myriadteam/myriadcoin,rnicoll/bitcoin,MeshCollider/bitcoin,mruddy/bitcoin,Flowdalic/bitcoin,mm-s/bitcoin,mruddy/bitcoin,practicalswift/bitcoin,ahmedbodi/vertcoin,GlobalBoost/GlobalBoost,kallewoof/bitcoin,bespike/litecoin,nikkitan/bitcoin,jlopp/statoshi,Kogser/bitcoin,dscotese/bitcoin,fujicoin/fujicoin,tjps/bitcoin,achow101/bitcoin,FeatherCoin/Feathercoin,practicalswift/bitcoin,ahmedbodi/vertcoin,JeremyRubin/bitcoin,JeremyRubin/bitcoin,kazcw/bitcoin,jtimon/bitcoin,jnewbery/bitcoin,gjhiggins/vcoincore,rnicoll/dogecoin,monacoinproject/monacoin,lateminer/bitcoin,bitcoinsSG/bitcoin,kazcw/bitcoin,pataquets/namecoin-core,untrustbank/litecoin,Xekyo/bitcoin,vertcoin/vertcoin,yenliangl/bitcoin,Kogser/bitcoin,fanquake/bitcoin,cdecker/bitcoin,kallewoof/bitcoin,fanquake/bitcoin,bitcoinsSG/bitcoin,mitchellcash/bitcoin,Kogser/bitcoin,Kogser/bitcoin,fanquake/bitcoin,namecoin/namecore,sstone/bitcoin,anditto/bitcoin,FeatherCoin/Feathercoin,alecalve/bitcoin,AkioNak/bitcoin,bitcoinsSG/bitcoin,Kogser/bitcoin,jamesob/bitcoin,lateminer/bitcoin,prusnak/bitcoin,DigitalPandacoin/pandacoin,jnewbery/bitcoin,AkioNak/bitcoin,peercoin/peercoin,ajtowns/bitcoin,Christewart/bitcoin,wellenreiter01/Feathercoin,pstratem/bitcoin,andreaskern/bitcoin,instagibbs/bitcoin,Christewart/bitcoin,peercoin/peercoin,RHavar/bitcoin,dscotese/bitcoin,MeshCollider/bitcoin,monacoinproject/monacoin,Xekyo/bitcoin,GlobalBoost/GlobalBoost,ajtowns/bitcoin,RHavar/bitcoin,particl/particl-core,MarcoFalke/bitcoin,Flowdalic/bitcoin,wellenreiter01/Feathercoin,untrustbank/litecoin,vertcoin/vertcoin,gjhiggins/vcoincore,pstratem/bitcoin,jambolo/bitcoin,kazcw/bitcoin,bitcoin/bitcoin,GlobalBoost/GlobalBoost,Kogser/bitcoin,gjhiggins/vcoincore,rnicoll/bitcoin,midnightmagic/bitcoin,peercoin/peercoin,rnicoll/dogecoin,prusnak/bitcoin,jonasschnelli/bitcoin,Kogser/bitcoin,droark/bitcoin,jtimon/bitcoin,GroestlCoin/GroestlCoin,alecalve/bitcoin,Sjors/bitcoin,cdecker/bitcoin,apoelstra/bitcoin,vertcoin/vertcoin,nikkitan/bitcoin,tjps/bitcoin,litecoin-project/litecoin,jtimon/bitcoin,FeatherCoin/Feathercoin,mm-s/bitcoin,cdecker/bitcoin,EthanHeilman/bitcoin,bespike/litecoin,pstratem/bitcoin,cdecker/bitcoin,jonasschnelli/bitcoin,andreaskern/bitcoin,Sjors/bitcoin,myriadcoin/myriadcoin,n1bor/bitcoin,bitcoinknots/bitcoin,jambolo/bitcoin,jambolo/bitcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,alecalve/bitcoin,bitcoinknots/bitcoin,apoelstra/bitcoin,practicalswift/bitcoin,Xekyo/bitcoin,ericshawlinux/bitcoin,RHavar/bitcoin,anditto/bitcoin,nikkitan/bitcoin,tecnovert/particl-core,myriadteam/myriadcoin,alecalve/bitcoin,untrustbank/litecoin,GroestlCoin/bitcoin,vertcoin/vertcoin,ajtowns/bitcoin,OmniLayer/omnicore,kazcw/bitcoin,bitcoin/bitcoin,mruddy/bitcoin,bitcoin/bitcoin,sipsorcery/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,AkioNak/bitcoin,FeatherCoin/Feathercoin,n1bor/bitcoin,ahmedbodi/vertcoin,RHavar/bitcoin,jambolo/bitcoin,sstone/bitcoin,nikkitan/bitcoin,dscotese/bitcoin,pataquets/namecoin-core,litecoin-project/litecoin,kallewoof/bitcoin,midnightmagic/bitcoin,myriadcoin/myriadcoin,DigitalPandacoin/pandacoin,prusnak/bitcoin,rnicoll/bitcoin,lateminer/bitcoin,Christewart/bitcoin,r8921039/bitcoin,ericshawlinux/bitcoin,alecalve/bitcoin,fujicoin/fujicoin,tecnovert/particl-core,Kogser/bitcoin,rnicoll/dogecoin,qtumproject/qtum,achow101/bitcoin,achow101/bitcoin,jonasschnelli/bitcoin,n1bor/bitcoin,mm-s/bitcoin,ElementsProject/elements,midnightmagic/bitcoin,andreaskern/bitcoin,yenliangl/bitcoin,OmniLayer/omnicore,mruddy/bitcoin,fujicoin/fujicoin,bespike/litecoin,mm-s/bitcoin,Christewart/bitcoin,Flowdalic/bitcoin,GroestlCoin/bitcoin,apoelstra/bitcoin,ElementsProject/elements,GroestlCoin/bitcoin,MarcoFalke/bitcoin,pstratem/bitcoin,FeatherCoin/Feathercoin,sstone/bitcoin,CryptArc/bitcoin,qtumproject/qtum,qtumproject/qtum,domob1812/namecore,dscotese/bitcoin,tecnovert/particl-core,anditto/bitcoin,andreaskern/bitcoin,untrustbank/litecoin,OmniLayer/omnicore,pstratem/bitcoin,RHavar/bitcoin,jtimon/bitcoin,vertcoin/vertcoin,GroestlCoin/GroestlCoin,myriadteam/myriadcoin,litecoin-project/litecoin,midnightmagic/bitcoin,JeremyRubin/bitcoin,wellenreiter01/Feathercoin,mitchellcash/bitcoin,bitcoinknots/bitcoin,r8921039/bitcoin,domob1812/bitcoin,MarcoFalke/bitcoin,jlopp/statoshi,particl/particl-core,domob1812/namecore,CryptArc/bitcoin,MarcoFalke/bitcoin,apoelstra/bitcoin,fujicoin/fujicoin,OmniLayer/omnicore,jambolo/bitcoin,instagibbs/bitcoin,midnightmagic/bitcoin,peercoin/peercoin,r8921039/bitcoin,tecnovert/particl-core,myriadcoin/myriadcoin,domob1812/namecore,lateminer/bitcoin,dscotese/bitcoin,pataquets/namecoin-core,nikkitan/bitcoin,anditto/bitcoin,yenliangl/bitcoin,dscotese/bitcoin,ajtowns/bitcoin,practicalswift/bitcoin,gjhiggins/vcoincore,jamesob/bitcoin,apoelstra/bitcoin,lateminer/bitcoin,gjhiggins/vcoincore,litecoin-project/litecoin,ahmedbodi/vertcoin,namecoin/namecore,ElementsProject/elements,gjhiggins/vcoincore,AkioNak/bitcoin,fujicoin/fujicoin,afk11/bitcoin,namecoin/namecore,litecoin-project/litecoin,namecoin/namecoin-core,GroestlCoin/GroestlCoin,AkioNak/bitcoin,cdecker/bitcoin,CryptArc/bitcoin,alecalve/bitcoin,CryptArc/bitcoin,achow101/bitcoin,prusnak/bitcoin,jamesob/bitcoin,GlobalBoost/GlobalBoost,jamesob/bitcoin,namecoin/namecore,afk11/bitcoin,jlopp/statoshi,myriadteam/myriadcoin,bitcoinsSG/bitcoin,Sjors/bitcoin,jlopp/statoshi,domob1812/namecore,JeremyRubin/bitcoin,jamesob/bitcoin,bitcoin/bitcoin,EthanHeilman/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,domob1812/bitcoin,MeshCollider/bitcoin,GlobalBoost/GlobalBoost,rnicoll/bitcoin,tjps/bitcoin,afk11/bitcoin,n1bor/bitcoin,yenliangl/bitcoin,mruddy/bitcoin,n1bor/bitcoin,namecoin/namecoin-core,droark/bitcoin,CryptArc/bitcoin,FeatherCoin/Feathercoin,mitchellcash/bitcoin,Kogser/bitcoin,particl/particl-core,monacoinproject/monacoin,jtimon/bitcoin,jnewbery/bitcoin,DigitalPandacoin/pandacoin,tjps/bitcoin,GroestlCoin/bitcoin,fanquake/bitcoin,afk11/bitcoin,afk11/bitcoin,OmniLayer/omnicore,Xekyo/bitcoin,jamesob/bitcoin,bitcoinknots/bitcoin,qtumproject/qtum,RHavar/bitcoin,Flowdalic/bitcoin,pataquets/namecoin-core,midnightmagic/bitcoin,DigitalPandacoin/pandacoin,peercoin/peercoin,bitcoinknots/bitcoin,mitchellcash/bitcoin,litecoin-project/litecoin,achow101/bitcoin,GlobalBoost/GlobalBoost,nikkitan/bitcoin,EthanHeilman/bitcoin,bitcoin/bitcoin,mitchellcash/bitcoin,sipsorcery/bitcoin,kallewoof/bitcoin,monacoinproject/monacoin,mitchellcash/bitcoin,Xekyo/bitcoin,instagibbs/bitcoin,wellenreiter01/Feathercoin,domob1812/namecore,untrustbank/litecoin,EthanHeilman/bitcoin,myriadteam/myriadcoin,ericshawlinux/bitcoin,droark/bitcoin,lateminer/bitcoin,GroestlCoin/GroestlCoin,ericshawlinux/bitcoin,practicalswift/bitcoin,bespike/litecoin,sstone/bitcoin,Flowdalic/bitcoin,kazcw/bitcoin,rnicoll/dogecoin,n1bor/bitcoin,kazcw/bitcoin,AkioNak/bitcoin,domob1812/bitcoin,ElementsProject/elements,Flowdalic/bitcoin,sipsorcery/bitcoin,domob1812/namecore,Kogser/bitcoin,domob1812/bitcoin,myriadcoin/myriadcoin,peercoin/peercoin,CryptArc/bitcoin,ericshawlinux/bitcoin,yenliangl/bitcoin,myriadcoin/myriadcoin,bespike/litecoin,Sjors/bitcoin,JeremyRubin/bitcoin,andreaskern/bitcoin,mruddy/bitcoin,namecoin/namecoin-core,untrustbank/litecoin,pataquets/namecoin-core,ElementsProject/elements,DigitalPandacoin/pandacoin,OmniLayer/omnicore,jlopp/statoshi,wellenreiter01/Feathercoin,wellenreiter01/Feathercoin,bitcoinsSG/bitcoin,sstone/bitcoin,EthanHeilman/bitcoin,namecoin/namecoin-core,rnicoll/dogecoin,kallewoof/bitcoin,namecoin/namecoin-core,sstone/bitcoin,bitcoin/bitcoin,fanquake/bitcoin,monacoinproject/monacoin,jnewbery/bitcoin,myriadcoin/myriadcoin,monacoinproject/monacoin,bitcoinsSG/bitcoin,achow101/bitcoin,cdecker/bitcoin,prusnak/bitcoin,practicalswift/bitcoin,Christewart/bitcoin,r8921039/bitcoin