Roll Observatory packages and add a roll script

packages/observe/.packages

Index: packages/observe/.packages
diff --git a/packages/observe/.packages b/packages/observe/.packages
new file mode 100644
index 0000000000000000000000000000000000000000..c0135499aa258c6412b9203d867ed68c25f7f610
--- /dev/null
+++ b/packages/observe/.packages
@@ -0,0 +1,36 @@
+# Generate by pub on 2015-08-19 15:03:37.242.
+# This file contains a map from Dart package names to Dart package locations.
+# Dart tools, including the Dart VM and Dart analyzer, rely on the content.
+# AUTO GENERATED - DO NOT EDIT
+analyzer:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/analyzer-0.26.1/lib/
+args:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/args-0.13.2/lib/
+barback:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/barback-0.15.2+6/lib/
+benchmark_harness:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/benchmark_harness-1.0.4/lib/
+browser:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/browser-0.10.0+2/lib/
+charcode:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/charcode-1.1.0/lib/
+chart:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/chart-1.0.8/lib/
+cli_util:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/cli_util-0.0.1+2/lib/
+code_transformers:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/code_transformers-0.2.9+1/lib/
+collection:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/collection-1.1.1/lib/
+csslib:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/csslib-0.12.1/lib/
+glob:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/glob-1.0.5/lib/
+html:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/html-0.12.1+2/lib/
+intl:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/intl-0.8.10+4/lib/
+logging:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/logging-0.11.1+1/lib/
+meta:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/meta-0.8.8/lib/
+observe:lib/
+package_config:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/package_config-0.1.1/lib/
+path:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/path-1.3.6/lib/
+plugin:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/plugin-0.1.0/lib/
+pool:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/pool-1.1.0/lib/
+smoke:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/smoke-0.3.5/lib/
+source_maps:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/source_maps-0.10.1/lib/
+source_span:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/source_span-1.1.3/lib/
+stack_trace:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/stack_trace-1.4.1/lib/
+string_scanner:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/string_scanner-0.1.3+1/lib/
+unittest:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/unittest-0.11.6+1/lib/
+utf:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/utf-0.9.0+2/lib/
+watcher:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/watcher-0.9.7/lib/
+when:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/when-0.2.0/lib/
+which:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/which-0.1.3/lib/
+yaml:file:///usr/local/google/home/jakemac/.pub-cache/hosted/pub.dartlang.org/yaml-2.1.3/lib/