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/io/ClassMapping.as

@@ -0,0 +1,17 @@
+package com.threerings.io {
+
+public class ClassMapping
+{
+    public var code :int;
+    public var classname :String;
+    public var streamer :Streamer;
+
+    public function ClassMapping (code :int, classname :String,
+            streamer :Streamer)
+    {
+        this.code = code;
+        this.classname = classname;
+        this.streamer = streamer;
+    }
+}
+}