Add vendor (steam)

vendor/github.com/Philipp15b/go-steam/client_events.go

@@ -0,0 +1,20 @@
+package steam
+
+import (
+	"github.com/Philipp15b/go-steam/netutil"
+)
+
+// When this event is emitted by the Client, the connection is automatically closed.
+// This may be caused by a network error, for example.
+type FatalErrorEvent error
+
+type ConnectedEvent struct{}
+
+type DisconnectedEvent struct{}
+
+// A list of connection manager addresses to connect to in the future.
+// You should always save them and then select one of these
+// instead of the builtin ones for the next connection.
+type ClientCMListEvent struct {
+	Addresses []*netutil.PortAddr
+}