Gnome software shortcut

@luyatshimbalanga prepared a file named metainfo.xml which allow to Gnome Software to view it as add-on based on the Appstream add-on guideline and the short version.

Simply download the metainfo.xml and feel free to make the necessary change.

<component type="addon">
<script/>
​
<id>scribus-generator</id>
<extends>scribus.desktop</extends>
<name>Scribus Generator</name>
<summary>PDF (and Scribus) template and mail-merge</summary>
<url type="homepage">https://berteh.github.io/ScribusGenerator/</url>
<url type="bugtracker">https://github.com/berteh/ScribusGenerator/issues</url>
<metadata_license>CC0-1.0</metadata_license>
<project_license>MIT</project_license>
</component>