Add ASCII art to illustrate concepts laid out in DTS documentation. For
example,

2 link topology:

+------------------------------+                
+------------------------------+                      
|                              |                 |                             
|                      
|                              | --------------- |                             
|                      
|                              |                 |                             
|                      
|  Tester (Traffic Generator)  |                 |     System Under Test       
|                      
|                              |                 |                             
|                      
|                              | --------------- |                             
|                      
|                              |                 |                             
|                      
+------------------------------+                
+------------------------------+             




1 link topology: 

+------------------------------+                
+------------------------------+                      
|                              |                 |                             
|                      
|                              | --------------- |                             
|                      
|                              |                 |                             
|                      
|  Tester (Traffic Generator)  |                 |     System Under Test       
|                      
|                              |                 |                             
|                      
|                              |                 |                             
|                      
|                              |                 |                             
|                      
+------------------------------+                                  
+------------------------------+       



2 link topology on a single host:                                               


                       -----------------------------------                      
                      |                                   |                     
                      |     -------------------------     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                      |    |                        |     |                     
                +--------------------------------------------------+            
                |                                                  |            
                |                                                  |            
                |                                                  |            
                |                                                  |            
                |          Combined Tester & SUT system            |            
                |                                                  |            
                |                                                  |           
                      -
                |                                                  |            
                |                                                  |            
                +--------------------------------------------------+

Bug ID	1752
Summary	Add ASCII Art to DTS Docs
Product	DPDK
Version	unspecified
Hardware	All
OS	All
Status	UNCONFIRMED
Severity	enhancement
Priority	Normal
Component	DTS
Assignee	dev@dpdk.org
Reporter	dmarx@iol.unh.edu
CC	juraj.linkes@pantheon.tech, probb@iol.unh.edu
Target Milestone	---