Added initial docs

docs/samples/getting_started.cs

@@ -0,0 +1,26 @@
+class Program
+{
+    private static DiscordBotClient _client;
+    static void Main(string[] args)
+    {
+        var client = new DiscordClient();
+        
+        //Echo any message received, provided it didn't come from us
+        client.MessageCreated += async (s, e) =>
+        {
+            if (!e.Message.IsAuthor)
+                await client.SendMessage(e.Message.ChannelId, e.Message.Text);
+        };
+        
+        //Convert our sync method to an async one and blocks this function until the client disconnects
+        client.Run(async () =>
+        {
+            //Connect to the Discord server usinotng our email and password
+            await client.Connect("discordtest@email.com", "Password123");
+            
+            //If we are not a member of any server, use our invite code
+            if (!client.Servers.Any())
+                await client.AcceptInvite("aaabbbcccdddeee");
+        });
+    }
+}