Added a serializable version of long. It is split into two ints inste…

…ad..

Script/Utils/Id64.cs

@@ -0,0 +1,35 @@
+using UnityEngine;
+using System.Collections;
+
+[System.Serializable]
+public class Id64
+{
+	public int low;
+	public int high;
+
+	public Id64(long l) {
+		low = (int)(l & 0xFFFFFFFF);
+		high = (int)(l >> 32);
+	}
+
+	public static implicit operator long(Id64 l) {
+		long h = ((long)l.high) << 32;
+		long lo = l.low & 0x00000000FFFFFFFF;		
+		return h | lo;
+	}
+
+	public static implicit operator Id64(long l) {
+		return new Id64(l);
+	}
+
+	public override bool Equals(System.Object b) {
+		long la = this;
+		long lb = ((Id64)b);
+		return la.Equals(lb);
+	}
+
+	public override int GetHashCode() {
+		long l = (long)this;
+		return l.GetHashCode();
+	}
+}