Add sample word cloud image

Author: jjonescz

README.md

@@ -4,6 +4,8 @@
 
 `KnowledgePicker.WordCloud` is a modern (.NET Standard 2.0) and fast library for arranging and drawing [word clouds](https://knowledgepicker.com/t/427/tag-word-cloud) (a.k.a. tag clouds or wordle).
 
+![Sample Word Cloud](example.png)
+
 ## How to use
 
 1. Install [NuGet package `KnowledgePicker.WordCloud`](https://www.nuget.org/packages/KnowledgePicker.WordCloud/).

WordCloud.sln

@@ -17,6 +17,13 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Examples", "Examples", "{D1
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WordFrequency.ConsoleApp", "examples\WordFrequency.ConsoleApp\WordFrequency.ConsoleApp.csproj", "{04B54227-4468-4505-B319-A270BBCFCCE5}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Docs", "Docs", "{F47A7AED-602F-4B34-B58C-D512AAC6B17A}"
+	ProjectSection(SolutionItems) = preProject
+		example.png = example.png
+		LICENSE = LICENSE
+		README.md = README.md
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU