Modernize the AppStream metadata

- Add Winetricks screenshot
- Add OARS metadata that are now required
- Add missing developer_name and launchable tags
- Switch to a rDNS app id format that is now required
- Various fixes to make the file adhere to modern standards
- Remove my copyright and update_contact, keep it only in the d/copyright file

Makefile

@@ -57,7 +57,7 @@ install:
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/applications
 	$(INSTALL_DATA) src/winetricks.desktop $(DESTDIR)$(PREFIX)/share/applications/winetricks.desktop
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/metainfo
-	$(INSTALL_DATA) src/winetricks.appdata.xml $(DESTDIR)$(PREFIX)/share/metainfo/winetricks.appdata.xml
+	$(INSTALL_DATA) src/io.github.winetricks.Winetricks.metainfo.xml $(DESTDIR)$(PREFIX)/share/metainfo/io.github.winetricks.Winetricks.metainfo.xml
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps
 	$(INSTALL_DATA) src/winetricks.svg $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/winetricks.svg
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/share/bash-completion/completions

debian/copyright

@@ -29,7 +29,7 @@ Copyright:
  2013,2016 André Hentschel <[email protected]>
 License: LGPL-2.1+
 
-Files: src/winetricks.appdata.xml
+Files: src/io.github.winetricks.Winetricks.metainfo.xml
 Copyright:
  2017 Daniel Rusek <[email protected]>
 License: CC0-1.0

src/io.github.winetricks.Winetricks.metainfo.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>io.github.winetricks.Winetricks</id>
+  <launchable type="desktop-id">winetricks.desktop</launchable>
+  <project_license>LGPL-2.1+</project_license>
+  <metadata_license>CC0-1.0</metadata_license>
+  <name>Winetricks</name>
+  <developer_name>Dan Kegel and others</developer_name>
+  <summary>Work around problems and install applications under Wine</summary>
+  <description>
+    <p>
+      Winetricks is an easy way to work around problems in Wine.
+    </p>
+    <p>
+      It lets you install missing DLLs or tweak various Wine settings individually.
+      It also has a menu of supported games/apps for which it can do all the workarounds automatically.
+    </p>
+  </description>
+  <url type="homepage">https://github.com/Winetricks/winetricks</url>
+  <screenshots>
+    <screenshot type="default">
+      <caption>Winetricks main window</caption>
+      <image type="source">https://raw.githubusercontent.com/Winetricks/winetricks/master/screenshot.png</image>
+    </screenshot>
+  </screenshots>
+  <content_rating type="oars-1.1"/>
+</component>