Breaking changes

• settings for Disqus changed from disqus_shortname to the following

    disqus:
      enable: false
      shortname:
      count: true
  

Features

• Close Search Popup by pressing ESC key. #1467
• Add the configure for declare copyright on posts. #1497
• Add changyan comments #1514
• Add an wave background effect based on three.js #1534

Updates

• Update FontAwesome to 4.7.0
• Change the detection of adding link to categories/tags state
• Build: Add filename to the message when errors occur of the languages file

Bugs

• Remove redundant symbols. #1494
• Fix #1482
• Fix Bug: Sidebar in posts does not expand automatically when disabling use_motion. #1302

For full changes, see the comparison between 5.1.0 and 5.1.1