doc: add example design to README

Author: evanlucas

README.md

@@ -1,9 +1,9 @@
 ## React Coding Challenge
 
-This code challenge tests your skills in react.js, testing and modular design. 
+This code challenge tests your skills in react.js, testing and modular design.
 The purpose of the application is to correctly render a stream of messages coming from an api. Different messages will be coded different colors and require slightly different rendering. The rules are described in detail below.
 
-This challenge already includes an API response. It is not required or expected for you to make any changes to this interaction. 
+This challenge already includes an API response. It is not required or expected for you to make any changes to this interaction.
 
 The 3 priorities that we provide you are:
   * 1 = error
@@ -12,11 +12,11 @@ The 3 priorities that we provide you are:
 
 ### Acceptance Criteria
 
-1. Messages should be rendered in a table-like structure. The newest messages should appear at the top of their respective columns. 
+1. Messages should be rendered in a table-like structure. The newest messages should appear at the top of their respective columns.
 
 Note: The example design below.
 
-
+![Example Design](https://raw.githubusercontent.com/helpdotcom/react-coding-challenge/master/grid.png)
 
 
 2. The messages should be color coded depending on the priority of the message. The appropriate color per priority is: