Added tag 2.2 for changeset 39f7ef5ef221
Bumped to 2.3 in preparation for next release.
Do not override _bytecode_filenames

The overridden version cannot handle Python 3.x while distutils verion can
handle it just fine.

--HG--
extra : rebase_source : 86fa56285849e97780e91eff405881bfb72184d5
Update changelog