+Changes from 4.0 to 4.0.1
+ 1) Added support for Python 2.6. On Windows a manifest file is now required
+ because of the switch to using the new Microsoft C runtime.
+ 2) Ensure that hooks are run for builtin modules.
Changes from 4.0b1 to 4.0
1) Added support for copying files to the target directory.
2) Added support for a hook that runs when a module is missing.