Add screenies for viewing code on GitHub

Author: jcansdale

docs/contributing/images/open-on-github.png

@@ -8,13 +8,14 @@ GitHub for Visual Studio enables easy navigation to code that exists on GitHub d
 3. In the code editor, highlight the section of text that you want to view in the browser.
 
 ## Viewing the selected code on GitHub
-1. Right click and select **Open Link** from the **GitHub** submenu. TODO: screenshot
+1. Right click and select **Open on GitHub** from the **GitHub** submenu.
+![Open on GitHub](images/open-on-github.png)
 2. Your browser will open and navigate to the code on GitHub.
 
 ## Copying the URL of the selected code's location on GitHub
-1. Right click and select **Copy Link** from the **GitHub** submenu. The URL will be copied to the clipboard. TODO: screenshot
+1. Right click and select **Copy link to clipboard** from the **GitHub** submenu. The URL will be copied to the clipboard.
 2. Paste the URL into your browser to view it on GitHub.
 
 ## Viewing the selected code in blame view on GitHub
-1. Right click and select **Blame** from the **GitHub** submenu. TODO: screenshot
+1. Right click and select **Blame** from the **GitHub** submenu.
 2. Your browser will open and navigate to the code in blame view on GitHub.