Added smart overrides for SafeSimpleDateFormat so that it delegates t…

…o the contain SimpleDateFormat instead for hashCode() and equals().

src/main/java/com/cedarsoftware/util/SafeSimpleDateFormat.java

@@ -114,4 +114,12 @@ public void set2DigitYearStart(Date date)
     public String toString() {
         return _format.toString();
     }
+
+    public boolean equals(Object other) {
+        return getDateFormat(_format).equals(other);
+    }
+
+    public int hashCode() {
+        return getDateFormat(_format).hashCode();
+    }
 }