prep 0.4.0 release

Closes #771

Squashed commit of the following:

commit 782791f
Author: Seth Ladd <sethladd@google.com>
Date:   Wed Aug 5 09:42:30 2015 -0700

    prep 0.4.0 release

CHANGELOG.md

@@ -1,5 +1,13 @@
-## Unreleased
+## 0.4.0
 * Print the name of the thing above the right nav list
+* Numerous fixes, tests, and cleanups to the code
+* fix: top-level consts are linked correctly from doc references
+* fix: if a doc comment cannot be resolved, it is wrapped in a code element
+* fix: links generated on the Enum page
+* fix: background is dark when left drawer is open
+* fix: better error message when running dartdoc on empty directory
+* fix: don't show left drawer toggle on homescreen
+* fix: docs for a class that extends List showed double methods
 
 ## 0.3.0
 * new: left nav now animates in on mobile

lib/dartdoc.dart

@@ -30,7 +30,7 @@ export 'src/package_meta.dart';
 
 const String name = 'dartdoc';
 // Update when pubspec version changes.
-const String version = '0.3.0';
+const String version = '0.4.0';
 
 final String defaultOutDir = 'doc${Platform.pathSeparator}api';
 

pubspec.yaml

@@ -1,6 +1,6 @@
 name: dartdoc
 # Also update the `version` field in lib/dartdoc.dart.
-version: 0.3.0
+version: 0.4.0
 author: Dart Team <misc@dartlang.org>
 description: A documentation generator for Dart.
 homepage: https://github.com/dart-lang/dartdoc