Add column support

Adds support for rendering arbitrary data into columns.

Closes #67

examples/Columns/Columns.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Spectre.Console\Spectre.Console.csproj" />
+  </ItemGroup>
+
+</Project>

examples/Columns/Program.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Newtonsoft.Json.Linq;
+using Spectre.Console;
+using Spectre.Console.Rendering;
+
+namespace ColumnsExample
+{
+    public static class Program
+    {
+        public static async Task Main()
+        {
+            // Download some random users
+            using var client = new HttpClient();
+            dynamic users = JObject.Parse(
+                await client.GetStringAsync("https://randomuser.me/api/?results=15"));
+
+            // Create a card for each user
+            var cards = new List<Panel>();
+            foreach(var user in users.results)
+            {
+                cards.Add(new Panel(GetCard(user))
+                    .SetHeader($"{user.location.country}")
+                    .RoundedBorder().Expand());
+            }
+
+            // Render all cards in columns
+            AnsiConsole.Render(new Columns(cards));
+        }
+
+        private static string GetCard(dynamic user)
+        {
+            var name = $"{user.name.first} {user.name.last}";
+            var country = $"{user.location.city}";
+
+            return $"[b]{name}[/]\n[yellow]{country}[/]";
+        }
+    }
+}

examples/Diagnostic/Program.cs

@@ -1,4 +1,3 @@
-using System;
 using Spectre.Console;
 
 namespace Diagnostic

examples/Table/Program.cs

@@ -1,5 +1,4 @@
 using Spectre.Console;
-using Spectre.Console.Rendering;
 
 namespace TableExample
 {