Fix ServiceTypes, ExcludeServiceTypes, and DocPath desktop file entries to match XDG specifications

src/kstreamripper.desktop

@@ -7,5 +7,5 @@ Exec=kstreamripper
 Icon=kstreamripper
 Type=Application
 Comment=A streamripper GUI for TDE
-DocPath=kstreamripper/index.html
+X-DocPath=kstreamripper/index.html
 Categories=Qt;TDE;AudioVideo;Audio;Player;