Add help command

GhostBallBot/game/game.py

@@ -255,9 +255,19 @@ class GameManager:
         return await self.message.channel.send(message)
 
     async def help(self):
-        """help command"""
-        # TODO: Add help message
-        help_message = "help"
+        """help command - Sends a DM to the requesting user with available commands"""
+
+        help_message = (
+            "Braveball commands\n"
+            + "!braveball - Start new game\n"
+            + "!guess - While a game is running, add a guess"
+            + " (or update an existing one) from 1-1000\n"
+            + "!resolve <value> - 1-1000 to resolve the game\n"
+            + " You can also add a batter's guess with: "
+            + "!resolve <value> <discord id #> <guess>\n"
+            + "!points - Shows a table of the most recent players, and their scores\n"
+            + "!help - Shows this message"
+        )
 
         recipient = await self.discord.fetch_user(self.message.author.id)
         await recipient.send(help_message)