Merge branch 'preserve-ORIG_BUILD_DIR' of https://github.com/tommyvn/heroku-buildpack-python into multi

This reverts commit 1e5ff1f8, reversing
changes made to 83538ca6.

Preserve original build directory (including previously-installed programs) when moving app to /app during build.

Python 3.5.0 and Pypy 2.6.1

Preserve original build directory (including previously-installed programs) when moving app to /app during build.

This means that binaries installed in $BUILD_DIR/.heroku/node (let's say) will
remain available during build, at the paths previous buildpacks established.

Added python-3.5.0
Added pypy-2.6.1
Updated Readme.md

--------- Forwarded message ----------
From: M.-A. Lemburg <mal@python.org>
Date: Wed, Aug 12, 2015 at 1:41 AM
Subject: Re: [psf-trademarks] Question on usage of Python logo
To: Craig Kerstiens <craig@heroku.com>, psf-trademarks@python.org


Hi Craig,

we are happy to approve your use of the logo.

Thanks,
--
Marc-Andre Lemburg
Director
Python Software Foundation
http://www.python.org/psf/

On 27.07.2015 20:32, Craig Kerstiens wrote:...

Anything using theses exported variables should be using them in the new
context rather than the old