Python3 compatibility

[AndreaCrotti]

Few simple fixes to support Python3 and add a tox.ini to easily test python2.7/3.3/3.4

[hobailey]

Hi @AndreaCrotti,
Thank you very much for your work here. We've decided not to merge this because it would then force current users to upgrade their Python before they could further update their SDK but I will add a reference to your PR in the readme incase others wish to update the SDK themselves.

[AndreaCrotti]

I'm sorry but I think you haven't understood the PR.
It makes the code work for both Python3 and Python2, it won't force ANYONE to upgrade.

I mean it's up to you, but not supporting Python3 in 2014 is almost as bad as not having a python SDK considering that none of the libraries you are using is not already been ported to Python3..

[ilrico]

I guess this guy answering to you works on a 640K RAM computer ("640K ought to be enough for anybody" kind-of answer)...
Anyway not a problem, there's plenty of other payment providers supporting python3 nowadays, just google their competitors.

[llann]

I really do not understand why you don't want your SDK to be comatible with Python 3 AND Python 2 (as the pull request is designed for)?

[ilrico]

@ilann : try Stripe.com for instance, their API is great, and believe me or not, compatible Python 3 (yes, really !)

[hobailey]

Hi everyone, sorry for the lack of news. We're just getting this signed off by our developers and we'll update the SDK as soon as we can.

[llann]

@ilrico : I didn't knew this payment platform, thanks, looks great :)
@hobailey : Good to know that you are listening and reacting to people's comments :)

[hobailey]

Hello again everyone. As you can see from this commit 210c313 the SDK is now Python 2.7 and 3 compatible :-)
Thanks for your help and feedback along the way.