Update version in header to 2.0.0
diff --git a/mock/mock.py b/mock/mock.py
index 0239ce7..f246f2a 100644
--- a/mock/mock.py
+++ b/mock/mock.py
@@ -2,7 +2,7 @@
 # Test tools for mocking and patching.
 # E-mail: fuzzyman AT voidspace DOT org DOT uk
 #
-# mock 1.0.1
+# mock 2.0.0
 # http://www.voidspace.org.uk/python/mock/
 #
 # Copyright (c) 2007-2013, Michael Foord & the mock team