===
- Fixed uninstallation on Windows
- Added ``pip search`` command.
- Tab-complete names of installed distributions for ``pip uninstall``.
- Support tab-completion when there is a global-option before the
subcommand.
- Install header files in standard (scheme-default) location when installing
outside a virtualenv. Install them to a slightly more consistent
non-standard location inside a virtualenv (since the standard location is
a non-writable symlink to the global location).
- pip now logs to a central location by default (instead of creating
``pip-log.txt`` all over the place) and constantly overwrites the
file in question. On Unix and macOS this is ``'$HOME/.pip/pip.log'``
and on Windows it's ``'%HOME%\\pip\\pip.log'``. You are still able to
override this location with the ``$PIP_LOG_FILE`` environment variable.
For a complete (appended) logfile use the separate ``'--log'`` command line
option.
- Fixed an issue with Git that left an editable package as a checkout of a
remote branch, even if the default behaviour would have been fine, too.
- Fixed installing from a Git tag with older versions of Git.
- Expand "~" in logfile and download cache paths.
- Speed up installing from Mercurial repositories by cloning without
updating the working copy multiple times.
- Fixed installing directly from directories (e.g.
``pip install path/to/dir/``).
- Fixed installing editable packages with ``svn+ssh`` URLs.
- Don't print unwanted debug information when running the freeze command.
- Create log file directory automatically. Thanks Alexandre Conrad.
- Make test suite easier to run successfully. Thanks Dave Abrahams.
- Fixed "pip install ." and "pip install .."; better error for directory
without setup.py. Thanks Alexandre Conrad.
- Support Debian/Ubuntu "dist-packages" in zip command. Thanks duckx.
- Fix relative --src folder. Thanks Simon Cross.
- Handle missing VCS with an error message. Thanks Alexandre Conrad.
- Added --no-download option to install; pairs with --no-install to separate
download and installation into two steps. Thanks Simon Cross.
- Fix uninstalling from requirements file containing -f, -i, or
--extra-index-url.
- Leftover build directories are now removed. Thanks Alexandre Conrad.