Add PBXReferenceProxy

Author: tomlokhorst

Xcode/Xcode/PBXObject.swift

@@ -133,6 +133,12 @@ public class PBXFileReference : PBXReference {
   public lazy var fullPath: Path = self.allObjects.fullFilePaths[self.id]!
 }
 
+public class PBXReferenceProxy : PBXReference {
+
+  // convenience accessor
+  public lazy var remoteRef: PBXContainerItemProxy = self.object("remoteRef")
+}
+
 public class PBXGroup : PBXReference {
   public lazy var children: [PBXReference] = self.objects("children")
 

Xcode/Xcode/XCProjectFile.swift

@@ -153,6 +153,7 @@ let types: [String: PBXObject.Type] = [
   "PBXTargetDependency": PBXTargetDependency.self,
   "XCConfigurationList": XCConfigurationList.self,
   "PBXReference": PBXReference.self,
+  "PBXReferenceProxy": PBXReferenceProxy.self,
   "PBXFileReference": PBXFileReference.self,
   "PBXGroup": PBXGroup.self,
   "PBXVariantGroup": PBXVariantGroup.self,