Change README to markdown format.

Add translation status overview.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 150ee6fac9)

README

@@ -12,9 +12,10 @@ can import CSV, RIS, BibTeX, and BibTeXML files; and export CSV, HTML, BibTeX,
 BibTeXML, and PilotDB. Tellico can also import data from Amazon, IMDb, CDDB,
 or any US-MARC compliant z39.50 server.
 
+.
 
-CONTRIBUTING
+Contributing
-==============
+--------------
 
 If you wish to contribute to tellico, you might do so:
 
@@ -23,3 +24,15 @@ If you wish to contribute to tellico, you might do so:
 
 - 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/-/tellico/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/tellico/)
+
+### desktop files
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/tellico-desktop-files/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/tellico-desktop-files/)