libclient: WIP, but almost completed

src/client/cmdVM/attachHelper.go

src/client/cmdVM/helper.go

src/client/cmdVM/vmAttachAsync.go

src/client/cmdVM/vmAttachAsyncSingle.go

src/client/cmdVM/vmAttachFromPwd.go

src/client/cmdVM/vmCreds2csv.go

src/client/cmdVM/vmCreds2pdf.go

src/client/cmdVM/vmListSingle.go

src/client/cmdVM/vmStartAttach.go

src/client/nexush/nexush.go

src/libclient/vm/vmGet.go

src/libclient/vm/vmGetSpiceCreds.go

src/server/router/routerVMs.go