unittest: refactor ahead of matcher changes

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 613d0849a980dbc2301270ddf09b157509de11d8..d87eb21c9a46c559a9c5b64708c6f82991462037 100644
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@@ -1,3 +1,21 @@
+##0.12.0
+
+* Removed `FailureHandler`, `DefaultFailureHandler`,
+`configureExpectFailureHandler`, and `getOrCreateExpectFailureHandler`. These

[nweiz, 2015/01/26 22:44:09]

Indent +2 here and below.

[kevmoo, 2015/01/27 00:11:29]

Done.

+are no longer needed.

[nweiz, 2015/01/26 22:44:09]

Explain why they're no longer needed. Imagine you're talking to a user who was
using them previously.

[kevmoo, 2015/01/27 00:11:29]

Done.

+
+* Moved a number of APIs from `matcher`, including:

[nweiz, 2015/01/26 22:44:09]

"from `matcher`" -> "from `matcher` into `unittest`"

Remove ":"

[kevmoo, 2015/01/27 00:11:29]

Done.

+`completes`, `completion`,`ErrorFormatter`,`expect`,`fail`,`prints`,

[nweiz, 2015/01/26 22:44:09]

Add spaces after commas.

[kevmoo, 2015/01/27 00:11:29]

Done.

+`TestFailure`,`Throws`, and all of the `throws` methods.
+
+    * `expect` no longer has a named `FailureHandler` argument.
+
+    * `expect` added an optional `ErrorFormatter` argument.

[nweiz, 2015/01/26 22:44:09]

Including the name of the argument will be more useful than the type name.

[kevmoo, 2015/01/27 00:11:29]

Done.

+
+* Removed several members from `SimpleConfiguration` that relied on removed
+  functionality: `onExpectFailure`, `onTestResult`, and
+  `stopTestOnExpectFailure`.
+
 ##0.11.5
 
 * Bumped the version constraint for `matcher`.