add portion for screenshot (#35)

* 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

* add screenshot portion

source/3/3.2/3.2.1/abiword.rst

@@ -14,7 +14,6 @@ Screenshot
 .. image:: abiword.png
    :width: 80%
 
-
 Useage
 ------
 To use abiword you type your document into the the window. You can save your document by clicking the icon that looks like a disk with an icon pointing down on it on the toolbar. If you wish to open this document again after say you shutdown your computer click the button that looks like a folder and a dialog will pop up to find the document. You can check your spelling with the button that says abc with a green squiggly line underneath it. To print press the icon that uses a printer with a down arrow underneath it. 

source/3/3.3/3.3.5/screenshot.rst

@@ -0,0 +1,19 @@
+Chapter 3.3.5 Screenshot
+========================
+
+Description
+-----------
+Screenshot is an application that lets you take pictures of what is on your screen. Features include a selectable area a delay, current window and entire screen to take pictures of. 
+
+Version
+-------
+Screenshot is version 3.25
+
+Screenshot
+----------
+.. image::
+   :width: 80%
+
+How to Launch
+-------------
+To launch in the menu > accessories > screenshot or run gnome-screenshot --interactive from the commandline.