bump for 0.5.0

Closes #815

Squashed commit of the following:

commit de2be94
Author: Seth Ladd <[email protected]>
Date:   Thu Aug 13 15:33:53 2015 -0700

    bump for 0.5.0

Author: sethladd

Diff for: CHANGELOG.md

@@ -1,3 +1,20 @@
+## 0.5.0
+* [health] remove calls to deprecated methods
+* [health] remove workaround when sorting empty iterable
+* [sdk] now requires Dart SDK 1.12-dev or greater
+* [bug] homepage column widths now add up to 12
+* [enhancement] display ellipse when text overflows out the one-liners
+* [enhancement] section titles are larger, lighter
+* [health] testing on Windows + 1.12-dev SDK
+* [enhancement] property types are now on the right
+* [enhancement] other various style tweaks
+* [enhancement] main text is darker, links are more contrasty
+* [enhancement] include dartdoc version in generated docs, as HTML comment
+* [enhancement] remove empty-doc warnings for unnamed libraries
+* [enhancement] dartdoc understands "sdk extensions"
+* [enhancement] find-as-you-type search
+* [bug] doc references to names with multiple underscores now link correctly
+
 ## 0.4.0
 * Print the name of the thing above the right nav list
 * Numerous fixes, tests, and cleanups to the code

Diff for: lib/dartdoc.dart

@@ -36,7 +36,7 @@ export 'src/package_meta.dart';
 
 const String name = 'dartdoc';
 // Update when pubspec version changes.
-const String version = '0.4.0';
+const String version = '0.5.0';
 
 final String defaultOutDir = 'doc${Platform.pathSeparator}api';
 

Diff for: pubspec.yaml

@@ -1,6 +1,6 @@
 name: dartdoc
 # Also update the `version` field in lib/dartdoc.dart.
-version: 0.4.0
+version: 0.5.0
 author: Dart Team <[email protected]>
 description: A documentation generator for Dart.
 homepage: https://github.com/dart-lang/dartdoc