Bump to 2.0.0 (#219)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1eaab8..bf5c241 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.0.0-dev
+## 2.0.0
 
 * **Breaking change:** The `Link` class has been renamed `LinkReference`, and
   the `Document` field, `refLinks`, has been renamed `linkReferences`.
@@ -14,6 +14,9 @@
   [GFM spec][strikethrough].
 * The above fixes raise compliance with the CommonMark specs to 93%, and
   compliance with the GFM specs to 92%.
+* Add an `encodeHtml` parameter to `Document`, which defaults to true. When
+  false, HTML entities (such as `&copy;` and the `<` character) will not be
+  escaped, useful when rendering Markdown in some output format other than HTML.
 * Allow the binary script to take a `--extension-set` option.
 
   A reminder: You can [run `bin/markdown.dart` from anywhere][pub-global] via:
diff --git a/lib/src/version.dart b/lib/src/version.dart
index f3d0d97..db17d9f 100644
--- a/lib/src/version.dart
+++ b/lib/src/version.dart
@@ -1,2 +1,2 @@
 /// The current version of markdown.
-final String version = '2.0.0-dev';
+final String version = '2.0.0';
diff --git a/pubspec.yaml b/pubspec.yaml
index 05da83a..4ffb7db 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 2.0.0-dev
+version: 2.0.0
 author: Dart Team <misc@dartlang.org>
 description: A library for converting markdown to HTML.
 homepage: https://github.com/dart-lang/markdown