- NadekoBot class renamed to Bot

- Implemented grpc based coordinator. Supports restarting, killing single or all shards, as well as getting current shard statuses. (Adaptation of the one used by the public bot)
- Coord is setup via coord.yml file
- Methods from SelfService which deal with shard/bot restart etc have been moved to ICoordinator (with GrpcRemoteCoordinator being the default implementation atm)
- Vastly simplified NadekoBot/Program.cs

src/NadekoBot/Services/ICoordinator.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+
+namespace NadekoBot.Services
+{
+    public interface ICoordinator
+    {
+        bool RestartBot();
+        void Die();
+        bool RestartShard(int shardId);
+        IEnumerable<ShardStatus> GetAllShardStatuses();
+        int GetGuildCount();
+    }
+    
+    public class ShardStatus
+    {
+        public Discord.ConnectionState ConnectionState { get; set; }
+        public DateTime Time { get; set; }
+        public int ShardId { get; set; }
+        public int Guilds { get; set; }
+    }
+}