Make mercurial easy installable

mercurial/version.py

@@ -12,7 +12,6 b' Mercurial version'
 import os
 import re
 import time
-import util
 
 unknown_version = 'unknown'
 remembered_version = False
@@ -49,7 +48,7 b' def remember_version(version=None):'
     """Store version information."""
     global remembered_version
     if not version and os.path.isdir(".hg"):
-        f = util.popen("hg identify")  # use real hg installation
+        f = os.popen("hg identify")  # use real hg installation
         ident = f.read()[:-1]
         if not f.close() and ident:
             ids = ident.split(' ', 1)