Stackless issue python#149: Bump Stackless version to "3.7"

Author: akruis

Stackless/changelog.txt

@@ -9,6 +9,9 @@ What's New in Stackless 3.X.X?
 
 *Release date: 20XX-XX-XX*
 
+- https://github.com/stackless-dev/stackless/issues/149
+  The Stackless version is now "3.7".
+
 - https://github.com/stackless-dev/stackless/issues/186
   Make Stackless compatible with subinterpreters. Previously creating a
   subinterpreter in one thread and using it in another thread caused a crash.

Stackless/stackless_version.h

@@ -1,7 +1,6 @@
 /*
  * Stackless version string
- * created at Tue May 16 13:27:25 2006 by mkversion.py
  */
 
 /* keep this entry up-to-date */
-#define STACKLESS_VERSION "3.1b3 060516"
+#define STACKLESS_VERSION "3.7"