[libgee] Add missing Future from README

[Maciej Marcin Piechotka <mpiechotka src gnome org>]

commit 35b446bc4cc547c91d8ac1e66ff5fa0d3286c4aa
Author: Maciej Piechotka <uzytkownik2 gmail com>
Date:   Sun Aug 18 21:27:56 2013 +0200

    Add missing Future from README

 README |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/README b/README
index 802318c..a36c2c6 100644
--- a/README
+++ b/README
@@ -23,6 +23,7 @@ Libgee provides the following interfaces:
                  + ListIterator
                        # BidirListIterator
      * MultiMap
+     * Future
 
 The ArrayList, ArrauQueue, ConcurrentLinkedList, ConcurrentSet, HashSet,
 HashMap, HashMultiSet, HashMultiMap, LinkedList, PriorityQueue, TreeSet,