Roll Observatory packages and add a roll script

packages/csslib/.packages

Index: packages/csslib/.packages
diff --git a/packages/csslib/.packages b/packages/csslib/.packages
new file mode 100644
index 0000000000000000000000000000000000000000..7c47ae322cef3d3d086b3a0d5f23489456ce5423
--- /dev/null
+++ b/packages/csslib/.packages
@@ -0,0 +1,37 @@
+# Generate by pub on 2015-07-10 14:34:54.820.
+# 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/sigmund/.pub-cache/hosted/pub.dartlang.org/analyzer-0.25.1/lib/
+args:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/args-0.13.2/lib/
+async:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/async-1.2.0/lib/
+barback:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/barback-0.15.2+4/lib/
+browser:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/browser-0.10.0+2/lib/
+charcode:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/charcode-1.1.0/lib/
+collection:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/collection-1.1.1/lib/
+crypto:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/crypto-0.9.0/lib/
+csslib:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/csslib-0.12.1/lib/
+glob:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/glob-1.0.4/lib/
+html:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/html-0.12.1+2/lib/
+http_multi_server:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/http_multi_server-1.3.2/lib/
+http_parser:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/http_parser-0.0.2+7/lib/
+logging:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/logging-0.11.1/lib/
+matcher:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/matcher-0.12.0+1/lib/
+mime:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/mime-0.9.3/lib/
+package_config:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/package_config-0.1.1/lib/
+path:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/path-1.3.6/lib/
+plugin:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/plugin-0.1.0/lib/
+pool:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/pool-1.1.0/lib/
+pub_semver:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/pub_semver-1.2.1/lib/
+shelf:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/shelf-0.6.2/lib/
+shelf_static:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/shelf_static-0.2.2/lib/
+shelf_web_socket:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/shelf_web_socket-0.0.1+2/lib/
+source_map_stack_trace:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/source_map_stack_trace-1.0.4/lib/
+source_maps:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/source_maps-0.10.1/lib/
+source_span:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/source_span-1.1.2/lib/
+stack_trace:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/stack_trace-1.3.4/lib/
+string_scanner:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/string_scanner-0.1.3+1/lib/
+test:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/test-0.12.3+6/lib/
+utf:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/utf-0.9.0+2/lib/
+watcher:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/watcher-0.9.6/lib/
+yaml:file:///usr/local/google/home/sigmund/.pub-cache/hosted/pub.dartlang.org/yaml-2.1.3/lib/