Revert "Rename version.py to calc_version.py to fix buildd error"

This reverts commit 943a9ded00.

MANIFEST.in

@@ -1,4 +1,4 @@
-include AUTHORS ChangeLog DEPENDS LICENSE  msgfmt.py RELEASE-VERSION calc_version.py README.rst
+include AUTHORS ChangeLog DEPENDS LICENSE  msgfmt.py RELEASE-VERSION version.py README.rst
 
 graft docs/man
 

generate_pot.py

@@ -19,7 +19,7 @@ from datetime import datetime
 from subprocess import call
 
 from gen_web_gettext import create_gettext_js
-from calc_version import get_version
+from version import get_version
 
 # Paths to exclude
 EXCLUSIONS = [

setup.py

@@ -24,7 +24,7 @@ from setuptools import find_packages, setup
 from setuptools.command.test import test as _test
 
 import msgfmt
-from calc_version import get_version
+from version import get_version
 
 try:
     from sphinx.setup_command import BuildDoc