fixes to filenames and start of xfburn. (#29)

* fix path to gnome-mpv

* fix document viewer index

* start xfburn

* fix file name capitilization

* cleanup bad filename.

source/3/3.3/3.3.11/xfburn.rst

@@ -0,0 +1,15 @@
+3.2.11 xfburn
+=============
+
+Description
+-----------
+xfburn is a utility for burning cds or dvds It can burn disks with data or audio cds for use in cd players.
+
+Version
+-------
+Lubuntu ships with version 0.5.5 of xfburn.
+
+How to launch
+-------------
+Go to the menu > Sound and video > xfburn. It also has an icon that looks like a cd disk.
+