Adding Initial API support, updating readme

Geekbot.net/Commands/Dog.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Discord.Commands;
+using Newtonsoft.Json;
+
+namespace Geekbot.net.Commands
+{
+    public class Dog : ModuleBase
+    {
+        [Command("dog", RunMode = RunMode.Async)]
+        [Summary("Return a random image of a dog.")]
+        public async Task Say()
+        {
+            using (var client = new HttpClient())
+            {
+                try
+                {
+                    client.BaseAddress = new Uri("http://random.dog");
+                    var response = await client.GetAsync("/woof.json");
+                    response.EnsureSuccessStatusCode();
+
+                    var stringResponse = await response.Content.ReadAsStringAsync();
+                    var dogFile = JsonConvert.DeserializeObject<DogResponse>(stringResponse);
+                    await ReplyAsync(dogFile.url);
+                }
+                catch (HttpRequestException e)
+                {
+                    await ReplyAsync($"Seems like the dog got lost (error occured)\r\n{e.Message}");
+                }
+            }
+        }
+    }
+
+    public class DogResponse
+    {
+        public string url { get; set; }
+    }
+}