Metainfo: Rename and improve (#32)

Author: ryonakano

data/friends.appdata.xml.in

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2018 elementary, Inc. <contact@elementary.io> -->
+<component type="desktop-application">
+  <id>io.elementary.friends</id>
+  <launchable type="desktop-id">io.elementary.friends.desktop</launchable>
+  <translation type="gettext">io.elementary.friends</translation>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0+</project_license>
+
+  <name>Friends</name>
+  <summary>Find and connect with contacts</summary>
+  <description>
+    <p>See and contact your friends from elementary OS</p>
+  </description>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/elementary/friends/master/data/screenshot.png</image>
+    </screenshot>
+  </screenshots>
+
+  <provides>
+    <binary>io.elementary.friends</binary>
+  </provides>
+
+  <content_rating type="oars-1.1"/>
+
+  <url type="homepage">https://elementary.io</url>
+  <url type="bugtracker">https://github.com/elementary/friends/issues</url>
+  <url type="donation">https://elementary.io/get-involved#funding</url>
+  <url type="help">https://github.com/elementary/friends/discussions/categories/q-a</url>
+  <url type="translate">https://l10n.elementary.io/engage/friends</url>
+
+  <developer id="org.elementaryos">
+    <name>elementary, Inc.</name>
+  </developer>
+  <project_group>elementary</project_group>
+  <update_contact>contact_at_elementary.io</update_contact>
+</component>

data/friends.metainfo.xml.in

@@ -14,8 +14,8 @@ i18n.merge_file(
 )
 
 i18n.merge_file(
-    input: 'friends.appdata.xml.in',
-    output: meson.project_name() + '.appdata.xml',
+    input: 'friends.metainfo.xml.in',
+    output: meson.project_name() + '.metainfo.xml',
     po_dir: join_paths(meson.source_root(), 'po', 'extra'),
     type: 'xml',
     install: true,

data/meson.build

@@ -1,2 +1,2 @@
-data/friends.appdata.xml.in
+data/friends.metainfo.xml.in
 data/friends.desktop.in