[gnome-chess] Replace Docbook with Mallard documentation

[Andre Klapper <aklapper src gnome org>]

commit e4015e0a021c7f2f5a8fb136df6f7e5b030e9094
Author: Andre Klapper <a9016009 gmx de>
Date:   Sat Dec 8 22:09:29 2018 +0100

    Replace Docbook with Mallard documentation
    
    Fixes #8

 help/C/figures/game-3-12.png                   | Bin 70439 -> 0 bytes
 help/C/figures/preferences-appearance-3-12.png | Bin 25289 -> 0 bytes
 help/C/figures/preferences-game-3-12.png       | Bin 22096 -> 0 bytes
 help/C/index.docbook                           | 733 -------------------------
 help/C/legal.xml                               |  85 ---
 help/meson.build                               |  22 +-
 6 files changed, 17 insertions(+), 823 deletions(-)
---
diff --git a/help/meson.build b/help/meson.build
index 96df0b2..8fffc8c 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,12 +1,24 @@
 help_sources = [
-  'index.docbook',
-  'legal.xml',
+  'bug-filing.page',
+  'change-board-orientation.page',
+  'change-look-feel.page',
+  'chess-engines.page',
+  'develop.page',
+  'documentation.page',
+  'index.page',
+  'license.page',
+  'play.page',
+  'rules.page',
+  'save-resume.page',
+  'shortcuts.page',
+  'timer.page',
+  'translate.page',
 ]
 
 help_media = [
-  'figures/game-3-12.png',
-  'figures/preferences-game-3-12.png',
-  'figures/preferences-appearance-3-12.png',
+  'figures/game-3-28.png',
+  'figures/logo.png',
+  'figures/logo32.png',
 ]
 
 gnome.yelp(meson.project_name(),