Roll Observatory packages and add a roll script

packages/unittest/CHANGELOG.md

+##0.11.6+1
+
+* Give tests more time to start running.
+
+##0.11.6
+
+* Merge in the last `0.11.x` release of `matcher` to allow projects to use both
+  `test` and `unittest` without conflicts.
+
+* Fix running individual tests with `HtmlIndividualConfiguration` when the test
+  name contains URI-escaped values and is provided with the `group` query
+  parameter.
+
+##0.11.5+4
+
+* Improved the output of `TestCase` failures in `HtmlConfig`.
+
+##0.11.5+3
+
+* Fixed issue with handling exceptions.
+
+##0.11.5+2
+
+* Properly detect when tests are finished being run on content shell.
+
+##0.11.5+1
+
+* Internal code cleanups and documentation improvements.
+
+##0.11.5
+
+* Bumped the version constraint for `matcher`.
+
+##0.11.4
+
+* Bump the version constraint for `matcher`.
+
+##0.11.3
+
+* Narrow the constraint on matcher to ensure that new features are reflected in
+  unittest's version.
+
+##0.11.2
+
+* Prints a warning instead of throwing an error when setting the test
+  configuration after it has already been set. The first configuration is always
+  used.
+
+##0.11.1+1
+
+* Fix bug in withTestEnvironment where test cases were not reinitialized if
+  called multiple times.
+
+##0.11.1
+
+* Add `reason` named argument to `expectAsync` and `expectAsyncUntil`, which has
+  the same definition as `expect`'s `reason` argument.
+* Added support for private test environments.
+
+##0.11.0+6
+
+* Refactored package tests.
+
+##0.11.0+5
+
+* Release test functions after each test is run.
+
+##0.11.0+4
+
+* Fix for [20153](https://code.google.com/p/dart/issues/detail?id=20153)
+
+##0.11.0+3
+
+* Updated maximum `matcher` version.
+
+##0.11.0+2
+
+*  Removed unused files from tests and standardized remaining test file names.
+
+##0.11.0+1
+
+* Widen the version constraint for `stack_trace`.
+
+##0.11.0
+
+* Deprecated methods have been removed:
+    * `expectAsync0`, `expectAsync1`, and `expectAsync2` - use `expectAsync`
+      instead
+    * `expectAsyncUntil0`, `expectAsyncUntil1`, and `expectAsyncUntil2` - use
+      `expectAsyncUntil` instead
+    * `guardAsync` - no longer needed
+    * `protectAsync0`, `protectAsync1`, and `protectAsync2` - no longer needed
+* `matcher.dart` and `mirror_matchers.dart` have been removed. They are now in
+  the `matcher` package.
+* `mock.dart` has been removed. It is now in the `mock` package.
+
+##0.10.1+2
+
+* Fixed deprecation message for `mock`.
+
+##0.10.1+1
+
+* Fixed CHANGELOG
+* Moved to triple-slash for all doc comments.
+
+##0.10.1
+
+* **DEPRECATED**
+    * `matcher.dart` and `mirror_matchers.dart` are now in the `matcher`
+      package.
+    * `mock.dart` is now in the `mock` package.
+* `equals` now allows a nested matcher as an expected list element or map value
+  when doing deep matching.
+* `expectAsync` and `expectAsyncUntil` now support up to 6 positional arguments
+  and correctly handle functions with optional positional arguments with default
+  values.
+
+##0.10.0
+
+* Each test is run in a separate `Zone`. This ensures that any exceptions that
+occur is async operations are reported back to the source test case.
+* **DEPRECATED** `guardAsync`, `protectAsync0`, `protectAsync1`,
+and `protectAsync2`
+    * Running each test in a `Zone` addresses the need for these methods.
+* **NEW!** `expectAsync` replaces the now deprecated `expectAsync0`,
+    `expectAsync1` and `expectAsync2`
+* **NEW!** `expectAsyncUntil` replaces the now deprecated `expectAsyncUntil0`,
+    `expectAsyncUntil1` and `expectAsyncUntil2`
+* `TestCase`:
+    * Removed properties: `setUp`, `tearDown`, `testFunction`
+    * `enabled` is now get-only
+    * Removed methods: `pass`, `fail`, `error`
+* `interactive_html_config.dart` has been removed.
+* `runTests`, `tearDown`, `setUp`, `test`, `group`, `solo_test`, and
+  `solo_group` now throw a `StateError` if called while tests are running.
+* `rerunTests` has been removed.