Add project files.

Assets/Cryville/Common/Unity/CallHelper.cs

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+using UnityEngine;
+using System;
+
+namespace Cryville.Common.Unity {
+	static class CallHelper {
+		public static bool HasFlag(this Enum obj, Enum flag) {
+			ulong num = Convert.ToUInt64(flag);
+			ulong num2 = Convert.ToUInt64(obj);
+			return (num2 & num) == num;
+		}
+
+		public static void ShowException(Exception ex) {
+			ShowMessageBox(ex.ToString());
+		}
+
+		public static void ShowMessageBox(string message) {
+			GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("Common/Popup")).GetComponent<Popup>().Message = message;
+		}
+
+		public static void Purge(Transform obj) {
+			foreach (Transform i in obj)
+				GameObject.Destroy(i.gameObject);
+		}
+
+		/*public static void DownloadAndUnzip(string url, FileInfo file) {
+			using (DownloadDialog d = new DownloadDialog()) {
+				d.Download(url, file);
+			}
+			using (ZipFile z = new ZipFile(file.FullName)) {
+				z.ExtractAll(file.DirectoryName, ExtractExistingFileAction.OverwriteSilently);
+			}
+		}*/
+	}
+}