Beginnings of the ActionScript 3.0 client: checkpoint checkin.

There's a long way to go and I think I need to rethink the way streaming
will work, but this is a start. These classes all compile under
the flex environment.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3842 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/presents/net/Credentials.as

@@ -0,0 +1,29 @@
+package com.threerings.presents.net {
+
+import com.threerings.io.*;
+import com.threerings.util.Name;
+
+public class Credentials
+    implements Streamable
+{
+    public function Credentials (username :Name)
+    {
+        _username = username;
+    }
+
+    // documentation inherited from interface Streamable
+    public function writeObject (out :ObjectOutputStream) :void
+        throws IOError
+    {
+    }
+
+    // documentation inherited from interface Streamable
+    public function readObject (in :ObjectInputStream) :void
+        throws IOError
+    {
+    }
+
+    /** The username. */
+    protected var _username :Name;
+}
+}