Antag Datums. Oh also minds. (#100)

AKA: Minds and there's a stupid basic roles framework.

Content.Server/GameObjects/Components/Mobs/MindComponent.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Content.Server.Mobs;
+using SS14.Server.GameObjects;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Interfaces.Network;
+using SS14.Shared.Log;
+
+namespace Content.Server.GameObjects.Components.Mobs
+{
+    /// <summary>
+    ///     Stores a <see cref="Server.Mobs.Mind"/> on a mob.
+    /// </summary>
+    public class MindComponent : Component
+    {
+        /// <inheritdoc />
+        public override string Name => "Mind";
+
+        /// <summary>
+        ///     The mind controlling this mob. Can be null.
+        /// </summary>
+        public Mind Mind { get; private set; }
+
+        /// <summary>
+        ///     True if we have a mind, false otherwise.
+        /// </summary>
+        public bool HasMind => Mind != null;
+
+        /// <summary>
+        ///     Don't call this unless you know what the hell you're doing.
+        ///     Use <see cref="Mind.TransferTo(IEntity)"/> instead.
+        ///     If that doesn't cover it, make something to cover it.
+        /// </summary>
+        public void InternalEjectMind()
+        {
+            Mind = null;
+        }
+
+        /// <summary>
+        ///     Don't call this unless you know what the hell you're doing.
+        ///     Use <see cref="Mind.TransferTo(IEntity)"/> instead.
+        ///     If that doesn't cover it, make something to cover it.
+        /// </summary>
+        public void InternalAssignMind(Mind value)
+        {
+            Mind = value;
+        }
+
+        public override void OnRemove()
+        {
+            base.OnRemove();
+
+            if (HasMind)
+            {
+                Mind.TransferTo(null);
+            }
+        }
+    }
+}