Pip

==================

- Fix an issue where the ``--download`` flag would cause pip to no longer use
randomized build directories.
- Fix an issue where pip did not properly unquote quoted URLs which contain
characters like PEP 440's epoch separator (``!``).
- Fix an issue where distutils installed projects were not actually uninstalled
and deprecate attempting to uninstall them altogether.
- Retry deleting directories in case a process like an antivirus is holding the
directory open temporarily.
- Fix an issue where pip would hide the cursor on Windows but would not reshow
it.

==================

- Fix a regression where Numpy requires a build path without symlinks to
properly build.
- Fix a broken log message when running ``pip wheel`` without a requirement.
- Don't mask network errors while downloading the file as a hash failure.
- Properly create the state file for the pip version check so it only happens
once a week.
- Fix an issue where switching between Python 3 and Python 2 would evict cached
items.
- Fix a regression where pip would be unable to successfully uninstall a
project without a normalized version.

==================

- Continue the regression fix from 6.0.5 which was not a complete fix.

==================

- Fix a regression with 6.0.4 under Windows where most commands would raise an
exception due to Windows not having the ``os.geteuid()`` function.

==================

- Fix an issue where ANSI escape codes would be used on Windows even though the
Windows shell does not support them, causing odd characters to appear with
the progress bar.
- Fix an issue where using -v would cause an exception saying
``TypeError: not all arguments converted during string formatting``.
- Fix an issue where using -v with dependency links would cause an exception
saying ``TypeError: 'InstallationCandidate' object is not iterable``.
- Fix an issue where upgrading distribute would cause an exception saying
``TypeError: expected string or buffer``.
- Show a warning and disable the use of the cache directory when the cache
directory is not owned by the current user, commonly caused by using ``sudo``
without the ``-H`` flag.
- Update PEP 440 support to handle the latest changes to PEP 440, particularly
the changes to ``>V`` and ``<V`` so that they no longer imply ``!=V.*``.
- Document the default cache directories for each operating system.
- Create the cache directory when the pip version check needs to save to it
instead of silently logging an error.
- Fix a regression where the ``-q`` flag would not properly suppress the
display of the progress bars.

==================

- Fix an issue where the implicit version check new in pip 6.0 could cause pip
to block for up to 75 seconds if PyPI was not accessible.
- Make ``--no-index`` imply ``--disable-pip-version-check``.