Update CHANGELOG

Author: DeathAxe

messages/3.1.0.md

@@ -9,9 +9,23 @@ feedback you can use [GitHub issues][issues].
 * Display correct key for `MarkdownEditing: Decrease Heading Level` in Command Palette
 * Use better table border color of Mariana color scheme
 * List MarkdownEditor-\*.tmTheme color schemes (see #666)
+* Improve bailouts from tables to fix highlighting of links after lines with pipes
 
 ## New Features
 
+* Added support for various syntaxes in fenced code blocks
+  - ActionScript
+  - AppleScript
+  - Arduino
+  - CSS
+  - HTTP request/response
+  - Terraform
+  - Twig
+  - Verilog
+
 ## Changes
 
+* Markdown.sublime-syntax has been refactored to increase readability,
+  fix several issues and prepare for future ST4 only changes.
+
 [issues]: https://github.com/SublimeText-Markdown/MarkdownEditing/issues