add image to D.S. General Flow.

DeathSockets-Flow.md

@@ -1,6 +1,6 @@
 To help you get up to speed on the way DeathSocket works, please consider the following image;
 
-IMAGE OF SYSTEM FLOW.
+![deathsocket general flow](attachments/deathsocket-general-flow.png)
 
 The way it works is you construct an `ImageSpec` record, found in "Domain.fs". When you have done that, you call one of the functions in "GridPainter.fs". After that, the image creation process begins. This is done via the functions within the other files and your `ImageSpec`. While this is happening, the function in "GridPainter.fs" (housed in the `GridPainter` module) maintains overall control and essentially co-ordinates the task.