Now compatible from Python 2.6-3.4 with all unit tests passing.

Hi
I've refactored most of the incompatibility issues, and package runs on Python 2.6, 2.7, 3.3, and 3.4. Here are some changes i've made.

[![Build Status](https://travis-ci.org/jjangsangy/disqus-python.svg?branch=master)](https://travis-ci.org/jjangsangy/disqus-python)
Changelog
----------------
* Added Travis-CI Integration
* General Bug/Compatibility Fixes
    * `+# -*- coding: utf-8 -*-` and `from __future__ import` idioms
* Supports wheel binary specification
* Removed depreciated modules e.g. `pkg_resources`
* Cleanup of `__init__.py`
* Added `requirements.txt` & `test_requirements.txt`
* Added Makefile for automation
* Created `__version__.py` as single authoritative reference of version \#

Some additional refactoring that would be useful
TODO:
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* Documentation, maybe just pulling the docstrings with Sphinx Autofunc
* Moving rest of code out of `__init__.py`
* Complete refactor of `setup.py`
* Authentication without secret key, or some cryptography.
* A `CONTRIBUTE.in` file
* Remove `simplejson` dependency 
I'd say to either pull in six to do this, since this is really gross to check on every single iteration. Or we can just vendorize the function we need.