Set GDAL and GEOS library locaiton explicitly in environment
variables:

*   GDAL_LIBRARY_PATH "/app/.heroku/vendor/lib/libgdal.so"
*   GEOS_LIBRARY_PATH "/app/.heroku/vendor/lib/libgeos_c.so"

Django has to settings with the same name. The setup now works as
described here:
https://devcenter.heroku.com/articles/postgis#geodjango-setup

* only do this on heroku-16

* history

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

* code comment

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

* fixed the bug for pypy-5.8.0

* enable shellcheck in makefile

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

* make compile script shellcheck compatible

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

* let's see what this says

* fix pip installation

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

* shellcheck detect script

* shellcheck release

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

* shellcheck test-compile

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

* shellcheck warnings/utils

* updated makefile

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

* shellcheck collectstatic

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

* shellcheck cryptography

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

* shellcheck eggpath fixes

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

* shellcheck gdal

* shellcheck goes-libs

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

* shellcheck mercurial

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

* nltk shellcheck

* shellcheck pip-install

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

* shellcheck pip-uninstall

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

* shellcheck pipenv

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

* shellcheck pylibmc

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

* shellcheck python

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

* update makefile

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

* final update to makefile

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

* fix tests

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

* actually fix the tests

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

* update pipenv-python-version

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

* requested fixes

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

* update spellcheck sources

* attempted fix for shell globbing

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

* further attempted fix

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

* switch nltk styling

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

* no more need for temp app for installing pip

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

* attempt at staged build for shellcheck

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

* attempted fix of travis file

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

* reorder travis file

* add shellcheck to install

* make things clearer in travis file

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

* better travis file

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

* attempt at better travis file

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

* better travis file

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

Since if someone previously had `GDAL` in their requirements file, they
would already have the gdalserver binary present from `bin/steps/gdal`
but be missing the proj and geos vendor files. By checking for `proj`
instead, we ensure that the vendoring isn't incorrectly skipped in this
case.

Since we need to set it regardless of whether the vendored library
existed previously or not.

To save the 301s.

Some people use pyOpenSSL (it is the literal name, e.g.: https://pypi.python.org/pypi/pyOpenSSL)