Determine Python version support

[hectcastro]

This is primarily to advertise the correct package classifiers on PyPI:

'Programming Language :: Python :: 2',
'Programming Language :: Python :: 3',

[mmcfarland]

Also, if the answer is 2 but it would be trivial to support 3, I think we should consider it. It's a fairly simple module.

[jamesmcclain]

The code was not compatible with Python 3 before because of a few minor issues, but I have just put up a pull request #18 to fix that. One thing that I do not know about is how to support testing of both languages in the same project (I don't expect that it is difficult, I just don't know how to do it).

[hectcastro]

From what I've seen thus far, other Python modules I've had to dig into use Tox for testing against multiple versions. Others may have more experience here though.

/cc @steventlamb

[steventlamb]

My experience is limited, I attempted to support python3 with django-queryset-csv, but backed out due to some stickiness with how the two different languages handled unicode, IIRC. However, when I was doing it, my strategy for testing was to rely on a free-for-FOSS cloud CI service like travisCI. Then, it's as simple as updating your .travis.yml to put python3 in the build matrix.

I have no experience with Tox.

If you're not going to free this repo, then I don't have much to offer. However, why would you bother supporting two different versions of python if this isn't going to be a public repo?

[hectcastro]

However, when I was doing it, my strategy for testing was to rely on a free-for-FOSS cloud CI service like travisCI. Then, it's as simple as updating your .travis.yml to put python3 in the build matrix.

That's the plan here too once we settle on a license. The main driver for something like Tox is to support local testing across versions as well. For Travis, the build matrix would be driven by overrides to TOXENV vs. the python array of versions.

[mmcfarland]

Once #6 & #5 are complete, let's set this up with the aim of being able to list v2 & 3, initial work has been done to verify that it should and the Travis build will keep it real.

[kdeloach]

Is this done?