* fixed the bug for pypy-5.8.0

* cleanup makefile

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* allow builds to happen when capitalization is used

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* restore behavior

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* make makefile default to heroku-16

* test geos libraries

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* Update GDAL version to 1.11.5

Update GDAL to latest bugfix release, see
http://trac.osgeo.org/gdal/wiki/Release/1.11.5-News

* Use pushd and popd in favor of cd

This copies the official Docker Python images approach of stripping
the Python test suite after building from source.

For Python 3.6.2 this reduces the output from 184MB to 121MB and
removes the following directories:
```
.heroku/python/lib/python3.6/tkinter/test
.heroku/python/lib/python3.6/ctypes/test
.heroku/python/lib/python3.6/unittest/test
.heroku/python/lib/python3.6/distutils/tests
.heroku/python/lib/python3.6/sqlite3/test
.heroku/python/lib/python3.6/lib2to3/tests
.heroku/python/lib/python3.6/test
```

For Python 2.7.13 this reduces the output from 127MB to 91MB and
removes the following directories:
```
.heroku/python/lib/python2.7/ctypes/test
.heroku/python/lib/python2.7/unittest/test
.heroku/python/lib/python2.7/distutils/tests
.heroku/python/lib/python2.7/bsddb/test
.heroku/python/lib/python2.7/lib-tk/test
.heroku/python/lib/python2.7/sqlite3/test
.heroku/python/lib/python2.7/lib2to3/tests
.heroku/python/lib/python2.7/json/tests
.heroku/python/lib/python2.7/email/test
.heroku/python/lib/python2.7/test
```

Fixes #424.

* pypy3-5.8.0

* updated cpython to 3.6.2

* update README to reflect new Python version

* update default python to 3.6.1

* v110

* nltk python2

The pip-uninstall step stopped working when it was moved to after
the pip-install step in f27a84e0.

This regression was temporarily fixed by part of #397, however that
PR was reverted in #404.

Adds a test to hopefully catch any future regressions :-)

Fixes #393.

* silently use sp-grep

* history

* update license

* python 3.5.3

* v108

* new setuptools version

* removed unneeded variable

* Revert "Fix pyyaml (#402)"

This reverts commit ff949085.

* Revert "Don't install packages that could mess packaging up (#397)"

This reverts commit 5496c02f.

* Revert "use pkg_resources to check for distributions (#395)"

This reverts commit 9b185f99.

* use sp-grep for django detection

* sp-grep

* fix setuptools script

* updated changelog

* remove setuptools sanity check

* update changelog

* pip-clean

* changelog note

* refactor codebase to improve package name detection

* fix version string

* cleanup

* add messaging, improve execution

* do uninstall first

The recent fixes on bob-builder master have now been released.

* updated changelog

* remove setuptools sanity check

more accurate than parsing requirements.txt
fixes #359

* attempted fix

* added a comment

* fixes

* improved changelog

* Updates bob-builder to a version that clears out the previous
  build directory, which prevents the stale files seen in #379.
* Adds a `buildenv-heroku-16` Make command to simplify the
  building and use of the Heroku-16 binary build environment.
* Sets `S3_BUCKET` and `S3_PREFIX` in the Docker image, to save
  having to do so manually each time.
* Removes the duplication of the bob-builder dependency between
  `Dockerfile` and `requirements.txt`.
* Disables the pip version check during Docker build, to avoid the
  noisy stderr warning about Ubuntu 16.04 pip being older (v8.1.1).
* Adds a `.dockerignore` to speed up the Docker build, by reducing
  the build context transferred to the daemon from 60MB to 2MB.
* Applies some Dockerfile best practices like disabling/removing
  cached files (since layer invalidation makes caching pointless).

In cases where there is no stderr there was previously no output,
which made it hard to find the cause. The assertion messages have
also been adjusted to remove the repetition (shunit2 already outputs
expected vs actual itself).

Before:
```
testPipenv
ASSERT:Expected captured exit code to be 0; was <2> expected:<0> but was:<2>
testPipenvVersion
```

After:
```
testPipenv
ASSERT:Captured exit code - expected:<0> but was:<2>
 !     Warning: Your application is missing a Procfile. This file tells Heroku how to run your application.
 !     Learn more: https://devcenter.heroku.com/articles/procfile
-----> Installing python-2.7.13
-----> Installing pip
-----> Generating 'requirements.txt' with pipenv

testPipenvVersion
```

Fixes #389.

* skip pip install for pipenv

* better

* improvements

* indent

* chmod +x

* export

* skip uninstall too

* pip freeze

* Revert "skip uninstall too"

This reverts commit faac96f62004f78c3d27a92cd865954fc7a3a53d.

* better comments

* redirect stderr to stdout

So that any changes made to `.heroku/` within pre_compile (such as
installing additional libraries required for the later pip install) are
not clobbered by the cache being copied over afterwards.

Fixes #320.

* update python.gunicorn.sh to WEB_CONCURRENCY.sh

* don't remove WEB_CONCURRENCY for prefixed 0s

* split gunicorn functionality into its own file

* cleanup comments

* fix var ordering

* add retry to curl

* use proper url for buildpack stdlib

* basics of metrics

* pin to stdlib v2

* measure python installation size

* lots of additional metrics

* add old output methods

* $

* empty commit

* don't unset DYNO (we're running on Heroku)

Fixes #280

* blacklist STACK env var for subshells