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

diff --git a/src/kstreamripper.desktop b/src/kstreamripper.desktop
index 5b3a45d..787b98d 100644
--- a/src/kstreamripper.desktop
+++ b/src/kstreamripper.desktop
@@ -7,5 +7,5 @@
 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;