Updated release info.

HISTORY.txt

-What's new in ZODB3 3.7.0?
-==========================
-Release date: ???
-[NOTE: even though 3.7 has not had a standalone release, it has effectively
-been released as part of Zope 3.3 and 2.10, and should be considered feature
-frozen.]
-
-BTrees
-------
-
-- Support for 64-bit integer keys and values has been provided as a
-  compile-time option.
-
 
 What's new in ZODB3 3.6.2?
 ==========================

NEWS.txt

-
-What's new on ZODB 3.7.0b4?
+What's new on ZODB 3.7.0c1?
 ===========================
 
 Packaging
@@ -107,6 +106,9 @@ BTrees
 - (3.7a1) Suppressed warnings about signedness of characters when
   compiling under GCC 4.0.x.  See http://www.zope.org/Collectors/Zope/2027.
 
+- (3.7a1) Support for 64-bit integer keys and values has been provided as a
+  compile-time option.
+
 Connection
 ----------