fix date in changes.txt
diff --git a/changes.txt b/changes.txt
index 3379f71..51da801 100644
--- a/changes.txt
+++ b/changes.txt
@@ -1,4 +1,4 @@
-XXX, 2017
+Aug 29th, 2017
v1.0.1
-- Dmitry Kovalenko provided fixes to mp_add_d() and mp_init_copy()
-- Matt Johnston contributed some improvements to mp_div_2d(),