Changed the line about serialization to avoid confusion. We do do that now (via Save), but not in the way this referred to.

README

@@ -63,10 +63,10 @@ downtime quickly.
     }
 
     // If you store a reference type like a pointer, slice, map or channel, you
-    // do not need to run Set if you modify the underlying data. The cache does
-    // not serialize its data, so if you modify a struct whose pointer you've
-    // stored in the cache, retrieving that pointer with Get will point you to
-    // the same data:
+    // do not need to run Set if you modify the underlying data. The cached
+    // reference points to the same memory, so if you modify a struct whose
+    // pointer you've stored in the cache, retrieving that pointer with Get will
+    // point you to the same data:
     foo := &MyStruct{Num: 1}
     c.Set("foo", foo, 0)
     ...