Add logging system to pub and sprinkle some logging in.

pkg/http/lib/src/base_request.dart

Index: pkg/http/lib/src/base_request.dart
diff --git a/pkg/http/lib/src/base_request.dart b/pkg/http/lib/src/base_request.dart
index 4a8b5ce4eb1700333616f6eca73d3288ed80ec3f..f603e0cf3d59e85fb97efe820cc383507dc2eeca 100644
--- a/pkg/http/lib/src/base_request.dart
+++ b/pkg/http/lib/src/base_request.dart
@@ -125,4 +125,9 @@ abstract class BaseRequest {
     if (!finalized) return;
     throw new StateError("Can't modify a finalized Request.");
   }
+
+  String toString() {
+    // TODO(rnystrom): Include headers?

[nweiz, 2012/12/05 23:56:54]

I don't think we want to include the headers (or stuff like request body) here.
I feel like toString() methods intended for debugging should be a summary when
possible, rather than the whole shebang.

[Bob Nystrom, 2012/12/06 01:33:26]

Removed TODO.

+    return "$method $url";
+  }
 }