Link to stable-errors site from pub-build messages on the command line.

pkg/observe/lib/transformer.dart

Index: pkg/observe/lib/transformer.dart
diff --git a/pkg/observe/lib/transformer.dart b/pkg/observe/lib/transformer.dart
index 0bd2895427d86607057d51a3909a436d78e9a96d..7d1bdb3e4fc865363a4b757b4691477bfc138430 100644
--- a/pkg/observe/lib/transformer.dart
+++ b/pkg/observe/lib/transformer.dart
@@ -73,7 +73,8 @@ class ObservableTransformer extends Transformer {
             ? 'package:${id.package}/${id.path.substring(4)}' : id.path;
       var sourceFile = new SourceFile(content, url: url);
       var logger = new BuildLogger(transform,
-          convertErrorsToWarnings: !releaseMode);
+          convertErrorsToWarnings: !releaseMode,
+          detailsUri: 'http://goo.gl/5HPeuP');
       var transaction = _transformCompilationUnit(
           content, sourceFile, logger);
       if (!transaction.hasEdits) {