Checking the existence of ".git" is not the right way to check whether we
are in develop environment because we distribute source tar-balls where
such a ".git" directory does not exist. Replaced it with checking .proto
files.

Fixes #333.

- Comply with flake8, except for indentation width, which is 2.

- Move human-centric metadata to top of 'setup()' call.

- Add Trove classifiers for supported Python versions.

- Use 'find_packages()' + MANIFEST.in to avoid errors in listing
  modules and packages.

Closes #131 and #161.

Use stdlib's 'unittest' instead.

We already run all tests with and without `--cpp_implementation`

This file was broken in ada65567.

Change-Id: Ief6eccab82712be04285fc918bf0102102bbce21

Change-Id: Ie5114bde3574c6cb0c67d5852b4658287561a0d3

Change-Id: Ifb4958e4f371b36f249faa466473f851697edb5c

Change-Id: Iae16dcae833959681a5c8e98764e5d1071e6fdcf

Change-Id: I33479e529b060e4fed532a827a386d3baecc835e

- Maps for C++ lite
- C++ Arena optimizations.
- Java Lite runtime code size optimization.

Change-Id: I7537a4357c1cb385d23f9e8aa7ffdfeefe079f13

  * Rosy hack doesn't apply (that test should be removed
    for the open-source release).

  * Added our own copy of parameterized.py (the open-source
    version of Google Apputils doesn't contain it).

  * The C++ Descriptor object didn't implement extension_ranges.

  * Had to implement a hack around returning EncodeError, to
    work around the module-loading behavior of the test runner.

Change-Id: I34d301133eea9c6f3a822c47d1f91e136fd33145

Change-Id: Icecb25db34ae5e6d5142a2d75ca7216ba018abb2

fix except syntax issue for py3

Reflect the change that protobuf should now only be supporting 2.6+ (I'd guess note python 3.x+ when its supported in implementation)

Refer to the Python Packaging User Guide for installing setuptools (and pip) instead of out of date telecommunity guide.

  1. Haven't included the include path for "config.h".
  2. Use of C++11 auto keyword.