Adds support to allow PEP8 to run natively on the Code Climate
Platform.

* Add --codeclimate to output issues in the format specified by
  the Code Climate specification.
* Create a Dockerfile to run PEP8 on the Code Climate platform.
* Modify behavior to only exit with return code 1 if the user
  supplies the --count CLI option to bring its behavior more in line
  with the documentation in --help.

In ruby, an empty array is truthy, but in python it is not.

When include_paths = [], the desired behavior is that no files
get analyzed. This change ensures that.

Previously, include_paths = [] got treated as missing
the include_paths key entirely, and defaulted to
analyzing everything.

Skip any files ending in other extensions containing py, like .pyo, .pyc, .pd

According to the spec
(https://github.com/codeclimate/spec/blob/master/SPEC.md#positions),
these column numbers must be 1-based, but they are 0-based by default.

Add 1 to offset for Code Climate column number

Base image switched to Alpine. The new image is almost 11x smaller.

2.2.0 (2016-11-14)
------------------

Bugs:

* Fixed E305 regression caused by #400;
  #593

2.1.0 (2016-11-04)
------------------

Changes:

* Report E302 for blank lines before an "async def";
  #556
* Update our list of tested and supported Python versions which are 2.6,
  2.7, 3.2, 3.3, 3.4 and 3.5 as well as the nightly Python build and
  PyPy.
* Report E742 and E743 for functions and classes badly named 'l', 'O',
  or 'I'.
* Report E741 on 'global' and 'nonlocal' statements, as well as
  prohibited single-letter variables.
* Deprecated use of `[pep8]` section name in favor of `[pycodestyle]`;
  #591

Bugs:

* Fix opt_type AssertionError when using Flake8 2.6.2 and pycodestyle;
  #561
* Require two blank lines after toplevel def, class;
  #536
* Remove accidentally quadratic computation based on the number of
  colons. This will make pycodestyle faster in some cases;
  #314

2.0.0 (2016-05-31)
------------------

Changes:

* Added tox test support for Python 3.5 and pypy3
* Added check E275 for whitespace on `from ... import ...` lines;
  #489 / #491
* Added W503 to the list of codes ignored by default ignore list;
  #498
* Removed use of project level `.pep8` configuration file;
  #364

Bugs:

* Fixed bug with treating `~` operator as binary; #383
  / #384
* Identify binary operators as unary; #484 /
  #485

1.7.0 (2016-01-12)
------------------

Changes:

* Reverted the fix in #368, "options passed on command
  line are only ones accepted" feature. This has many unintended
  consequences in pep8 and flake8 and needs to be reworked when I have
  more time.
* Added support for Python 3.5. (Issue #420 &
  #459)
* Added support for multi-line config_file option parsing. (Issue
  #429)
* Improved parameter parsing. (Issues #420 &
  #456)

Bugs:

* Fixed BytesWarning on Python 3. (Issue #459)

Dockerfile/PEP8 update

Don't clean up the files that are not there.

QUA-183: update pep8/pycodestyle

QUA-183: update circleci config

QUA-468: update base docker image

Update README.md

QUA-958: Push images to Dockerhub instead of GCR

Update with deprecation notice.md

Update README.md