Add release notes and content rating information to appdata

data/org.gajim.Gajim.appdata.xml.in

@@ -63,6 +63,7 @@
       <caption>Plugin manager</caption>
     </screenshot>
   </screenshots>
+  <launchable type="desktop-id">org.gajim.Gajim.desktop</launchable>
   <developer_name>Gajim Team</developer_name>
   <update_contact>gajim-devel_AT_gajim.org</update_contact>
   <url type="homepage">https://gajim.org/</url>
@@ -72,4 +73,32 @@
   <url type="donation">https://gajim.org/dev.php#donate</url>
   <url type="translate">https://dev.gajim.org/gajim/gajim/wikis/development/DevTranslate</url>
   <translation type="gettext">gajim</translation>
+  <content_rating type="oars-1.0">
+    <content_attribute id="violence-cartoon">none</content_attribute>
+    <content_attribute id="violence-fantasy">none</content_attribute>
+    <content_attribute id="violence-realistic">none</content_attribute>
+    <content_attribute id="violence-bloodshed">none</content_attribute>
+    <content_attribute id="violence-sexual">none</content_attribute>
+    <content_attribute id="drugs-alcohol">none</content_attribute>
+    <content_attribute id="drugs-narcotics">none</content_attribute>
+    <content_attribute id="drugs-tobacco">none</content_attribute>
+    <content_attribute id="sex-nudity">none</content_attribute>
+    <content_attribute id="sex-themes">none</content_attribute>
+    <content_attribute id="language-profanity">none</content_attribute>
+    <content_attribute id="language-humor">none</content_attribute>
+    <content_attribute id="language-discrimination">none</content_attribute>
+    <content_attribute id="social-chat">intense</content_attribute>
+    <content_attribute id="social-info">none</content_attribute>
+    <content_attribute id="social-audio">intense</content_attribute>
+    <content_attribute id="social-location">none</content_attribute>
+    <content_attribute id="social-contacts">none</content_attribute>
+    <content_attribute id="money-purchasing">none</content_attribute>
+    <content_attribute id="money-gambling">none</content_attribute>
+  </content_rating>
+  <releases>
+    <release version="1.0.3" date="2018-05-20" />
+    <release version="1.0.2" date="2018-04-30" />
+    <release version="1.0.1" date="2018-04-01" />
+    <release version="1.0.0" date="2018-03-17" />
+  </releases>
 </component>