Add support for retaining the active bookmark after updating to tagged revision for release.
2.10
====
``release`` script no longer invokes register prior to the upload. Instead, the user should either set the password in .pypirc (not recommended) or use Setuptools 20.1 and keyring to store the password securely.
2.9
===
Add ``show`` distutils command for showing attributes of the distribution.
2.8
===
Add ``packaging.depends.load_dependencies``.
2.7
===
Added ``--register`` option to ``upload-package`` command.