4.0.2: (stable)

* Main menu example: Make the keyboard shortcuts work
  (Kjell Ahlstedt)
* Update the Basics chapter
  (Kjell Ahlstedt) Issue #15 (Zachary Roman)
* PO-files: added: why `fuzzy` tag appears
  (DarkTrick) Merge request !14
* index-in.docbook: Upgrade from DocBook 4.5 to DocBook 5.0
* Recommend Meson instead of Autotools
* "The .hg and .ccg files" section: Describe 'ignore_deprecations'
* Update the README file
  (Kjell Ahlstedt)

Meson build:
* Require Meson >= 0.56.0
* Specify 'check' option in run_command()
* Don't use gnome.yelp()
  In Meson >= 0.61.0, it can't be used with a generated XML file.
* Add allow-network-access option
  (Kjell Ahlstedt)

Updated translation:
* Simplified Chinese (CCTV-1), merge request !12