doc: rename CHANGES/README/UPGRADE for GitLab

CHANGES → CHANGELOG.rst

@@ -93,7 +93,7 @@ in the storage node.
 - Replication & checking of replicas:
 
   - Fix crash when a corruption is found while checking TIDs.
-    2 other issues remain unfixed: see BUGS file.
+    2 other issues remain unfixed: see BUGS.rst file.
   - Speed up checking of replicas, at the cost of storage nodes being
     less responsive to other events.
 

MANIFEST.in

 graft tools
-include neo.conf CHANGES TODO TESTS.txt ZODB3.patch
+include neo.conf CHANGELOG.rst TODO TESTS.txt ZODB3.patch

setup.py

@@ -62,8 +62,8 @@ setup(
     license = 'GPL 2+',
     platforms = ["any"],
     classifiers=classifiers.splitlines(),
-    long_description = ".. contents::\n\n" + open('README').read()
-                     + "\n" + open('CHANGES').read(),
+    long_description = ".. contents::\n\n" + open('README.rst').read()
+                     + "\n" + open('CHANGELOG.rst').read(),
     packages = find_packages(),
     py_modules = ['mock'],
     entry_points = {