Create tag for 0.5.7 release.

deducing where 0.5.1 tag should be

extracted pythm-0.5.1-ptt5's tarball

extracted and cleaned pythm-0.5.1-ptt4.tar.bz2

Create 0.5.5 tag.

Create tag for 0.5.4 version.

as of 0.5.1-dmr-20090129