make chapter titles consistent in office applications. (#34)

* fix path to gnome-mpv

* fix document viewer index

* start xfburn

* fix file name capitilization

* cleanup bad filename.

* add tweaking your desktop chapter blurb.

* add screenshots for pavucontrol and xfburn

* add screenshot for abiword and evince

* add screenshot for simple-scan

* Fix double of abiword and write section for gnumeric

* Prepend chapter in 3.2 for consistency

source/3/3.2/3.2.1/abiword.rst

@@ -1,5 +1,5 @@
-3.2.1 Abiword
-=============
+Chapter 3.2.1 Abiword
+=====================
 
 Description
 -----------
@@ -14,10 +14,6 @@ Screenshot
 .. image:: abiword.png
    :width: 80%
 
-Screenshot
-----------
-.. image:: abiword.png
-   :width: 80%
 
 Useage
 ------

source/3/3.2/3.2.3/document_viewer.rst

@@ -1,5 +1,5 @@
-3.2.3 Document_viewer
-=====================
+Chapter 3.2.3 Document_viewer
+=============================
 
 Description
 -----------

source/3/3.2/3.2.4/simple_scan.rst

@@ -1,5 +1,5 @@
-3.2.4 Simple Scan
-=================
+Chapter 3.2.4 Simple Scan
+=========================
 
 Description
 -----------