Make the top level readme a link to package:test (#1477)

Most users want to see the `test` readme.
diff --git a/README.md b/README.md
deleted file mode 100644
index 39590b5..0000000
--- a/README.md
+++ /dev/null
@@ -1,19 +0,0 @@
-## Test Mono Repository
-
-This repository contains packages for writing and running Dart tests.
-
-## [test](https://github.com/dart-lang/test/blob/master/pkgs/test/README.md)
-
-A full featured packaged for writing and running Dart tests on various platforms,
-e.g. VM, Chrome, Node etc.
-
-
-## [test_api](https://github.com/dart-lang/test/blob/master/pkgs/test_api/README.md)
-
-A minimal package for writing tests. This package is used by `package:test` and
-`package:test_core`.
-
-## [test_core](https://github.com/dart-lang/test/blob/master/pkgs/test_core/README.md)
-
-A minimal package for writing and running tests. It also contains extensions for
-implementing a custom test runner. This package is used by `package:test`.
diff --git a/README.md b/README.md
new file mode 120000
index 0000000..789f748
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+pkgs/test/README.md
\ No newline at end of file