Added AutoFixture.Xunit2 link to readme
Added AutoFixture.Xunit2 link to readme

yuva2achieve/AutoFixture,sbrockway/AutoFixture,adamchester/AutoFixture,sergeyshushlyapin/AutoFixture,olegsych/AutoFixture,StevenJiang2015/AutoFixture,dcastro/AutoFixture,adamchester/AutoFixture,sergeyshushlyapin/AutoFixture,AutoFixture/AutoFixture,mrinaldi/AutoFixture,sean-gilliam/AutoFixture,hackle/AutoFixture,StevenJiang2015/AutoFixture,dcastro/AutoFixture,olegsych/AutoFixture,mrinaldi/AutoFixture,zvirja/AutoFixture,Pvlerick/AutoFixture,hackle/AutoFixture,sbrockway/AutoFixture,yuva2achieve/AutoFixture