Added Message documentation

src/Discord.Net/Message.cs

@@ -18,28 +18,43 @@ namespace Discord
 
 		private readonly DiscordClient _client;
 
+		/// <summary> Returns the unique identifier for this message. </summary>
 		public string Id { get; }
 
+		/// <summary> Returns true if the logged-in user was mentioned. </summary>
+		/// <remarks> This is not set to true if the user was mentioned with @everyone (see IsMentioningEverone). </remarks>
 		public bool IsMentioningMe { get; internal set; }
+		/// <summary> Returns true if @everyone was mentioned by someone with permissions to do so. </summary>
 		public bool IsMentioningEveryone { get; internal set; }
+		/// <summary> Returns true if the message was sent as text-to-speech by someone with permissions to do so. </summary>
 		public bool IsTTS { get; internal set; }
+		/// <summary> Returns the content of this message. </summary>
 		public string Text { get; internal set; }
+		/// <summary> Returns the timestamp of this message. </summary>
 		public DateTime Timestamp { get; internal set; }
+		/// <summary> Returns the attachments included in this message. </summary>
 		public Attachment[] Attachments { get; internal set; }
 
+		/// <summary> Returns a collection of all user ids mentioned in this message. </summary>
 		public string[] MentionIds { get; internal set; }
+		/// <summary> Returns a collection of all users mentioned in this message. </summary>
 		[JsonIgnore]
 		public IEnumerable<User> Mentions => MentionIds.Select(x => _client.GetUser(x)).Where(x => x != null);
 
+		/// <summary> Returns the id of the channel this message was sent in. </summary>
 		public string ChannelId { get; }
+		/// <summary> Returns the the channel this message was sent in. </summary>
 		[JsonIgnore]
 		public Channel Channel => _client.GetChannel(ChannelId);
 
+		/// <summary> Returns the id of the author of this message. </summary>
 		public string UserId { get; internal set; }
+		/// <summary> Returns the author of this message. </summary>
 		[JsonIgnore]
 		public User User => _client.GetUser(UserId);
-		
-		//Not Implemented
+
+		//TODO: Not Implemented
+		/// <summary> Not implemented, stored for reference. </summary>
 		public object[] Embeds { get; internal set; }
 
 		internal Message(string id, string channelId, DiscordClient client)