Change README to markdown format.

Add translation status overview.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit c6abc811ce)

README.md

@@ -14,14 +14,14 @@ other "biff" programs out there, namely:
 
 * Pure GUI configuration. No command line parameters or strange config
   files. All settings for KBiff can be done from one setup dialog.
-  
+
 * Session management. KBiff starts up with the same configuration you
   left it with.
-   
+
 * Panel docking. KBiff can be docked into the panel very easily. Handy
   when you are monitoring several mailboxes and don't have the room
   anywhere else.
-  
+
 * System sounds. KBiff can play most audio files when new mail arrives.
 
 * Animated gifs. KBiff can handle GIF89 animated gifs.
@@ -30,3 +30,28 @@ other "biff" programs out there, namely:
 
 * Highly configurable. There are very few things in KBiff that you
   have to accept. Most things can be changed to fit your needs.
+
+.
+
+Contributing
+--------------
+
+If you wish to contribute to KBiff (TDE), you might do so:
+
+- TDE Gitea Workspace (TGW) collaboration tool.
+  https://mirror.git.trinitydesktop.org/gitea
+
+- TDE Weblate Translation Workspace (TWTW) collaboration tool.
+  https://mirror.git.trinitydesktop.org/weblate
+
+
+Translations status
+---------------------
+
+### messages
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/kbiff/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/kbiff/)
+
+### desktop files
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/kbiff-kbiffdesktop/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/kbiff-kbiffdesktop/)