Remove Visual Studio 2017 reference from readme
Remove Visual Studio 2017 reference from readme

This PR was motivated by a comment in GUI PR (257) regarding a suggested improvement not being supported by VS2017.

When checking whether master can still be built with the VS2017 toolset ABI issues were encountered. Most likely due to the pre-compiled Qt binaries that are used.

It does not seem worth the effort to try and support VS2017, which would most likely require additional Qt binaries, or lengthy instructions on how to build static Qt binaries on Windows (which is very error prone and tedious).

Added advisory note about build not working with earlier Visual Studio versions.

Fixed grammar.

domob1812/namecore,qtumproject/qtum,andreaskern/bitcoin,sstone/bitcoin,GroestlCoin/bitcoin,AkioNak/bitcoin,domob1812/namecore,prusnak/bitcoin,anditto/bitcoin,domob1812/bitcoin,namecoin/namecore,ElementsProject/elements,MarcoFalke/bitcoin,namecoin/namecoin-core,JeremyRubin/bitcoin,bitcoin/bitcoin,bitcoinknots/bitcoin,rnicoll/bitcoin,mruddy/bitcoin,achow101/bitcoin,namecoin/namecore,particl/particl-core,jambolo/bitcoin,lateminer/bitcoin,jlopp/statoshi,mruddy/bitcoin,MarcoFalke/bitcoin,pataquets/namecoin-core,jambolo/bitcoin,sipsorcery/bitcoin,lateminer/bitcoin,bitcoin/bitcoin,sstone/bitcoin,apoelstra/bitcoin,sipsorcery/bitcoin,dscotese/bitcoin,instagibbs/bitcoin,tecnovert/particl-core,AkioNak/bitcoin,sipsorcery/bitcoin,fanquake/bitcoin,MarcoFalke/bitcoin,fujicoin/fujicoin,namecoin/namecore,JeremyRubin/bitcoin,GroestlCoin/GroestlCoin,kallewoof/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,apoelstra/bitcoin,mm-s/bitcoin,bitcoinsSG/bitcoin,instagibbs/bitcoin,qtumproject/qtum,andreaskern/bitcoin,prusnak/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,namecoin/namecore,domob1812/namecore,ajtowns/bitcoin,prusnak/bitcoin,particl/particl-core,instagibbs/bitcoin,ajtowns/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,mm-s/bitcoin,fanquake/bitcoin,andreaskern/bitcoin,jambolo/bitcoin,fujicoin/fujicoin,ajtowns/bitcoin,JeremyRubin/bitcoin,MarcoFalke/bitcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,kallewoof/bitcoin,GroestlCoin/GroestlCoin,prusnak/bitcoin,AkioNak/bitcoin,domob1812/namecore,namecoin/namecoin-core,jambolo/bitcoin,domob1812/namecore,namecoin/namecoin-core,ElementsProject/elements,jambolo/bitcoin,sstone/bitcoin,yenliangl/bitcoin,bitcoinsSG/bitcoin,achow101/bitcoin,lateminer/bitcoin,namecoin/namecoin-core,sipsorcery/bitcoin,GroestlCoin/GroestlCoin,yenliangl/bitcoin,particl/particl-core,kallewoof/bitcoin,jamesob/bitcoin,apoelstra/bitcoin,ElementsProject/elements,pataquets/namecoin-core,Xekyo/bitcoin,JeremyRubin/bitcoin,pataquets/namecoin-core,bitcoinsSG/bitcoin,fujicoin/fujicoin,apoelstra/bitcoin,apoelstra/bitcoin,particl/particl-core,namecoin/namecore,GroestlCoin/bitcoin,lateminer/bitcoin,ElementsProject/elements,instagibbs/bitcoin,GroestlCoin/GroestlCoin,GroestlCoin/bitcoin,GroestlCoin/bitcoin,dscotese/bitcoin,domob1812/namecore,jamesob/bitcoin,ajtowns/bitcoin,mruddy/bitcoin,tecnovert/particl-core,mruddy/bitcoin,rnicoll/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,bitcoinsSG/bitcoin,rnicoll/bitcoin,qtumproject/qtum,mm-s/bitcoin,pataquets/namecoin-core,dscotese/bitcoin,JeremyRubin/bitcoin,qtumproject/qtum,andreaskern/bitcoin,ajtowns/bitcoin,lateminer/bitcoin,tecnovert/particl-core,fanquake/bitcoin,instagibbs/bitcoin,Xekyo/bitcoin,qtumproject/qtum,domob1812/bitcoin,namecoin/namecoin-core,dscotese/bitcoin,AkioNak/bitcoin,fujicoin/fujicoin,namecoin/namecore,yenliangl/bitcoin,yenliangl/bitcoin,bitcoin/bitcoin,bitcoinsSG/bitcoin,MarcoFalke/bitcoin,mruddy/bitcoin,domob1812/bitcoin,lateminer/bitcoin,jlopp/statoshi,anditto/bitcoin,ElementsProject/elements,bitcoinknots/bitcoin,dscotese/bitcoin,ajtowns/bitcoin,Xekyo/bitcoin,tecnovert/particl-core,achow101/bitcoin,particl/particl-core,jamesob/bitcoin,anditto/bitcoin,jamesob/bitcoin,anditto/bitcoin,tecnovert/particl-core,jamesob/bitcoin,jlopp/statoshi,GroestlCoin/bitcoin,pataquets/namecoin-core,bitcoinsSG/bitcoin,bitcoinknots/bitcoin,sstone/bitcoin,kallewoof/bitcoin,mm-s/bitcoin,rnicoll/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,bitcoin/bitcoin,bitcoin/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,particl/particl-core,tecnovert/particl-core,mm-s/bitcoin,jlopp/statoshi,apoelstra/bitcoin,prusnak/bitcoin,fujicoin/fujicoin,yenliangl/bitcoin,rnicoll/bitcoin,AkioNak/bitcoin,qtumproject/qtum,fujicoin/fujicoin,bitcoinknots/bitcoin,sstone/bitcoin,kallewoof/bitcoin,fanquake/bitcoin,achow101/bitcoin,anditto/bitcoin,domob1812/bitcoin,bitcoin/bitcoin,mm-s/bitcoin,andreaskern/bitcoin,bitcoinknots/bitcoin,jambolo/bitcoin,mruddy/bitcoin,GroestlCoin/GroestlCoin,achow101/bitcoin,JeremyRubin/bitcoin,pataquets/namecoin-core,sstone/bitcoin,jlopp/statoshi,fanquake/bitcoin,AkioNak/bitcoin,rnicoll/bitcoin,kallewoof/bitcoin,ElementsProject/elements,prusnak/bitcoin,MarcoFalke/bitcoin,achow101/bitcoin,Xekyo/bitcoin,anditto/bitcoin