Update to 1.3.1

Upstream changes:
1.3.1 (2013-03-08)

Fixed a major backward incompatible change of parsing URLs to externally hosted packages that got accidentally included in 1.3.
1.3 (2013-03-07)

SSL Cert Verification; Make https the default for PyPI access. Thanks James Cleveland, Giovanni Bajo, Marcus Smith and many others (Pull #789).
Added "pip list" for listing installed packages and the latest version available. Thanks Rafael Caricio, Miguel Araujo, Dmitry Gladkov (Pull #752)
Fixed security issues with pip's use of temp build directories. Thanks David (d1b) and Thomas Guttler. (Pull #780)
Improvements to sphinx docs and cli help. (Pull #773)
Fixed issue #707, dealing with OS X temp dir handling, which was causing global NumPy installs to fail. (Pull #768)
Split help output into general vs command-specific option groups. Thanks Georgi Valkov. (Pull #744; Pull #721 contains preceding refactor)
Fixed dependency resolution when installing from archives with uppercase project names. (Pull #724)
Fixed problem where re-installs always occurred when using file:// find-links. (Pulls #683/#702)
"pip install -v" now shows the full download url, not just the archive name. Thanks Marc Abramowitz (Pull #687)
Fix to prevent unnecessary PyPI redirects. Thanks Alex Gronholm (Pull #695)
Fixed issue #670 - install failure under Python 3 when the same version of a package is found under 2 different URLs. Thanks Paul Moore (Pull #671)
Fix git submodule recursive updates. Thanks Roey Berman. (Pulls #674)
Explicitly ignore rel='download' links while looking for html pages. Thanks Maxime R. (Pull #677)
--user/--upgrade install options now work together. Thanks 'eevee' for discovering the problem. (Pull #705)
Added check in install --download to prevent re-downloading if the target file already exists. Thanks Andrey Bulgakov. (Pull #669)
Added support for bare paths (including relative paths) as argument to --find-links. Thanks Paul Moore for draft patch.
Added support for --no-index in requirements files.
Added "pip show" command to get information about an installed package. Fixes #131. Thanks Kelsey Hightower and Rafael Caricio.
Added --root option for "pip install" to specify root directory. Behaves like the same option in distutils but also plays nice with pip's egg-info. Thanks Przemek Wrzos. (Issue #253 / Pull #693)

(wen)