Roll Observatory packages and add a roll script

packages/dart_style/.status

Index: packages/dart_style/.status
diff --git a/packages/dart_style/.status b/packages/dart_style/.status
new file mode 100644
index 0000000000000000000000000000000000000000..5333c45d242e9239438696201710cadf48b897f3
--- /dev/null
+++ b/packages/dart_style/.status
@@ -0,0 +1,19 @@
+# Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Don't run any test-like files that show up in packages directories. It
+# shouldn't be necessary to run "pub install" in these packages, but if you do
+# it shouldn't break the tests.
+packages/*/*: Skip
+*/packages/*/*: Skip
+*/*/packages/*/*: Skip
+*/*/*/packages/*/*: Skip
+*/*/*/*/packages/*/*: Skip
+*/*/*/*/*/packages/*/*: Skip
+
+# No need to run any of the built output.
+build/test/*: Skip
+
+[ $browser ]
+test/*: Skip # Tests only run on the VM since they use dart:io.