Vagrant documentation improvement (#4120)
Vagrant documentation improvement (#4120)

* Added link to wsk client binaries as these are not built for Windows, and added appropriate Windows Powershell code to correctly handle nested commands in Windows systems

* Replaced references to compiled wsk binaries for Windows and MacOS with suitable downloads, refined commands to properly accommodate Windows Powershell

cbickel/openwhisk,akrabat/openwhisk,houshengbo/openwhisk,RSulzmann/openwhisk,dubeejw/openwhisk,csantanapr/incubator-openwhisk,style95/openwhisk,RSulzmann/openwhisk,starpit/openwhisk,rabbah/openwhisk,openwhisk/openwhisk,markusthoemmes/openwhisk,csantanapr/incubator-openwhisk,akrabat/openwhisk,starpit/openwhisk,style95/openwhisk,cbickel/openwhisk,jasonpet/openwhisk,dubeejw/openwhisk,jasonpet/openwhisk,rabbah/openwhisk,cbickel/openwhisk,akrabat/openwhisk,houshengbo/openwhisk,openwhisk/openwhisk,openwhisk/openwhisk,rabbah/openwhisk,openwhisk/openwhisk,rabbah/openwhisk,starpit/openwhisk,style95/openwhisk,akrabat/openwhisk,jeremiaswerner/openwhisk,markusthoemmes/openwhisk,jeremiaswerner/openwhisk,style95/openwhisk,sven-lange-last/openwhisk,rabbah/openwhisk,markusthoemmes/openwhisk,RSulzmann/openwhisk,jasonpet/openwhisk,dubeejw/openwhisk,akrabat/openwhisk,jasonpet/openwhisk,jeremiaswerner/openwhisk,houshengbo/openwhisk,RSulzmann/openwhisk,sven-lange-last/openwhisk,openwhisk/openwhisk,sven-lange-last/openwhisk,houshengbo/openwhisk,sven-lange-last/openwhisk,rabbah/openwhisk,jeremiaswerner/openwhisk,jeremiaswerner/openwhisk,starpit/openwhisk,csantanapr/incubator-openwhisk,cbickel/openwhisk,style95/openwhisk,markusthoemmes/openwhisk,markusthoemmes/openwhisk,csantanapr/incubator-openwhisk,cbickel/openwhisk,style95/openwhisk,markusthoemmes/openwhisk,jeremiaswerner/openwhisk,RSulzmann/openwhisk,cbickel/openwhisk,style95/openwhisk,sven-lange-last/openwhisk,houshengbo/openwhisk,markusthoemmes/openwhisk,akrabat/openwhisk,RSulzmann/openwhisk,sven-lange-last/openwhisk,csantanapr/incubator-openwhisk,dubeejw/openwhisk,jasonpet/openwhisk,cbickel/openwhisk,csantanapr/incubator-openwhisk,akrabat/openwhisk,houshengbo/openwhisk,dubeejw/openwhisk,openwhisk/openwhisk,csantanapr/incubator-openwhisk,jasonpet/openwhisk,markusthoemmes/openwhisk,RSulzmann/openwhisk,starpit/openwhisk,jasonpet/openwhisk,dubeejw/openwhisk,starpit/openwhisk,jeremiaswerner/openwhisk,houshengbo/openwhisk,rabbah/openwhisk,sven-lange-last/openwhisk