Add process.stderr stream

doc/api/process.markdown

@@ -81,6 +81,11 @@ Example: the definition of `console.log`
     };
 
 
+### process.stderr
+
+A writable stream to stderr. Writes on this stream are blocking.
+
+
 ### process.stdin
 
 A `Readable Stream` for stdin. The stdin stream is paused by default, so one

src/node.js

@@ -153,6 +153,14 @@
       return stdout;
     });
 
+    var stderr = process.stderr = {
+      writable: true,
+      readable: false,
+      write: process.binding('stdio').writeError
+    };
+
+    stderr.end = stderr.destroy = stderr.destroySoon = function() { };
+
     process.__defineGetter__('stdin', function() {
       if (stdin) return stdin;