Adds support for syncing Games and GameCollections

Delta/Database/Model/Human/Game.swift

@@ -9,6 +9,7 @@
 import Foundation
 
 import DeltaCore
+import Harmony
 
 @objc(Game)
 public class Game: _Game, GameProtocol
@@ -109,3 +110,27 @@ extension Game
         }
     }
 }
+
+extension Game: Syncable
+{
+    public static var syncablePrimaryKey: AnyKeyPath {
+        return \Game.identifier
+    }
+    
+    public var syncableKeys: Set<AnyKeyPath> {
+        return [\Game.artworkURL, \Game.filename, \Game.name, \Game.type]
+    }
+    
+    public var syncableFiles: Set<File> {
+        let gameFile = File(identifier: "game", fileURL: self.fileURL)
+        
+        let artworkURL = DatabaseManager.artworkURL(for: self)
+        let artworkFile = File(identifier: "artwork", fileURL: artworkURL)
+        
+        return [gameFile, artworkFile]
+    }
+    
+    public var syncableRelationships: Set<AnyKeyPath> {
+        return [\Game.gameCollection]
+    }
+}

Delta/Database/Model/Human/GameCollection.swift

@@ -9,6 +9,7 @@
 import CoreData
 
 import DeltaCore
+import Harmony
 
 @objc(GameCollection)
 public class GameCollection: _GameCollection
@@ -28,3 +29,14 @@ public class GameCollection: _GameCollection
         return system
     }
 }
+
+extension GameCollection: Syncable
+{
+    public static var syncablePrimaryKey: AnyKeyPath {
+        return \GameCollection.identifier
+    }
+    
+    public var syncableKeys: Set<AnyKeyPath> {
+        return [\GameCollection.index as AnyKeyPath]
+    }
+}

External/Harmony

@@ -1 +1 @@
-Subproject commit b6541ab7931e6b8291387d9e5c46e47fc63cfdca
+Subproject commit 47cc6cd87cd7e04765b05204a03f83c9eab7c159