[balsa/gtk3] Add an appdate file

[Peter Bloomfield <peterb src gnome org>]

commit 40bccd7f1b02fae6addab96e4d2058c154540336
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Wed Jan 28 19:40:15 2015 -0500

    Add an appdate file
    
        * balsa.appdata.xml: new appdata file

 ChangeLog         |    4 ++++
 Makefile.am       |    4 ++++
 balsa.appdata.xml |   26 ++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 2e7518d..1abf95e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2015-01-28  Peter Bloomfield  <pbloomfield bellsouth net>
 
+       * balsa.appdata.xml: new appdata file
+
+2015-01-28  Peter Bloomfield  <pbloomfield bellsouth net>
+
        * src/balsa-icons.c (load_balsa_pixmap),
        (balsa_register_pixmaps): prune much pointless code.
        * src/sendmsg-window.c (subject_not_empty),
diff --git a/Makefile.am b/Makefile.am
index 8e6e528..e24502c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,6 +11,10 @@ pixmap_DATA = gnome-balsa2.png
 desktopdir = $(datadir)/applications
 desktop_in_files = balsa.desktop.in balsa-mailto-handler.desktop.in
 desktop_DATA = balsa.desktop balsa-mailto-handler.desktop
+
+appdatadir = $(datarootdir)/appdata
+dist_appdata_DATA = balsa.appdata.xml
+
 @INTLTOOL_DESKTOP_RULE@
 
 balsa_extra_dist =             \
diff --git a/balsa.appdata.xml b/balsa.appdata.xml
new file mode 100644
index 0000000..040435b
--- /dev/null
+++ b/balsa.appdata.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2015 The Balsa developers -->
+<component type="desktop">
+    <id>balsa.desktop</id>
+    <metadata_licence>CC0-1.0</metadata_licence>
+    <description>
+        <p>
+            Balsa is a graphical mail client. While it is in active development,
+            Balsa has many features such as:
+        </p>
+        <ul>
+            <li>IMAP and POP3 support;</li>
+            <li>sendmail or direct SMTP support;</li>
+            <li>optional multi-threaded retrieval and sending of messages;</li>
+            <li>support for all configurations of local mail folders;</li>
+            <li>automatic mail checking;</li>
+            <li>mail printing;</li>
+            <li>inline attachment viewing;</li>
+        </ul>
+        <p>
+            and the proverbial much, much more.
+        </p>
+    </description>
+    <url type="homepage">http://pawsa.fedorapeople.org/balsa/</url>
+    <updatecontact>balsa-list_at_gnome.org</updatecontact>
+</component>