[pan2] Validate pan.appdata.xml.in and tweak cleanfiles

[Petr Kovář <pmkovar src gnome org>]

commit 28ab3baf75b6e45df3e1502e8d9e3817d0734e2d
Author: Petr Kovar <pknbe volny cz>
Date:   Fri Dec 29 18:14:31 2017 +0100

    Validate pan.appdata.xml.in and tweak cleanfiles

 .gitignore         |    1 -
 Makefile.am        |    9 ++++-----
 pan.appdata.xml.in |    1 +
 3 files changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index dfb5712..4fb7fdb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,7 +26,6 @@ Makefile
 Makefile.in*
 missing
 mkinstalldirs
-pan.desktop
 pan-git.version
 pan/icons/pan-pixbufs.h
 pan/icons/pan-pixbufs-internal.h
diff --git a/Makefile.am b/Makefile.am
index c8ee388..0509259 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,13 +19,12 @@ appdata_DATA = pan.appdata.xml
 man_MANS = pan.1
 
 CLEANFILES = \
- pan.appdata.xml \
- pan.desktop \
- $(appdata_DATA)
+ $(appdata_DATA) \
+ $(desktop_DATA)
 
 DISTCLEANFILES = \
- pan.appdata.xml \
- pan.desktop
+ README.windows \
+ pan-git.version
 
 MAINTAINERCLEANFILES = \
  $(srcdir)/aclocal.m4 \
diff --git a/pan.appdata.xml.in b/pan.appdata.xml.in
index 4e2cdf7..00339b4 100644
--- a/pan.appdata.xml.in
+++ b/pan.appdata.xml.in
@@ -24,4 +24,5 @@
   <url type="donation">http://pan.rebelbase.com/tipjar/</url>
   <url type="help">http://pan.rebelbase.com/manual/html/</url>
   <url type="translate">https://l10n.gnome.org/module/pan2/</url>
+  <translation type="gettext">pan</translation>
 </component>