Appdata update

[Hubert Figuiere]

Here is a patch to update the appdata file that is missing the last release, and to address validation errors:

• attribute-invalid : <screenshot> width (800) did not match specified (1600) [http://hugin.sourceforge.net/screenshots/appdata/hugin-1.png]
• attribute-invalid : <screenshot> height (600) did not match specified (900) [http://hugin.sourceforge.net/screenshots/appdata/hugin-1.png]
• attribute-invalid : <screenshot> width (800) did not match specified (1600) [http://hugin.sourceforge.net/screenshots/appdata/hugin-2.png]
• attribute-invalid : <screenshot> height (600) did not match specified (900) [http://hugin.sourceforge.net/screenshots/appdata/hugin-2.png]
• attribute-invalid : <screenshot> width (800) did not match specified (1600) [http://hugin.sourceforge.net/screenshots/appdata/hugin-3.png]
• attribute-invalid : <screenshot> height (600) did not match specified (900) [http://hugin.sourceforge.net/screenshots/appdata/hugin-3.png]
• attribute-invalid : <screenshot> width (800) did not match specified (1600) [http://hugin.sourceforge.net/screenshots/appdata/hugin-4.png]
• attribute-invalid : <screenshot> height (600) did not match specified (900) [http://hugin.sourceforge.net/screenshots/appdata/hugin-4.png]
• attribute-invalid : <screenshot> width (800) did not match specified (1600) [http://hugin.sourceforge.net/screenshots/appdata/hugin-5.png]
• attribute-invalid : <screenshot> height (600) did not match specified (900) [http://hugin.sourceforge.net/screenshots/appdata/hugin-5.png]

[Bruno Postle (brunopostle)]

The hugin fedora package is carrying a patch (since March 2015) that overwrites the calibrate_lens_gui.appdata.xml file with this. @hub Any idea if this is still needed?

<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright 2014 Richard Hughes <email address hidden> -->
<component type="desktop">
  <metadata_license>CC0-1.0</metadata_license>
  <id>calibrate_lens_gui.desktop</id>
  <metadata>
    <value key="X-Merge-With-Parent">hugin.desktop</value>
  </metadata>
</component>

[Hubert Figuiere (hub)]

I have no idea.

The other appdata files need the similar changes to the one I proposed though. I could submit more patches.

[tmodes (tmodes)]

Updated in the repository.
The release tag is a little bit fragile. It needs to update for each release which adds additional care for creating the packages.