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

PROFILE_PATH and WEBCONCURRENCY_PROFILE_PATH must land in the new build context and
so should be set after the new context is created

using the apt buildpack in combination with the multi buildpack exports some
paths out of ORIG_BUILD_DIR. By copying instead of moving this should allow
building of python modules that have dependancies on any packages installed
into ORIG_BUILD_DIR.

Revert "Update Readme.md"

Update Readme.md

Update pip to 7.1.0