Drop Python 2 support

[sils]

Does anyone mind if we do that?

[Cretezy]

We could. Projects using this library will most likely be new and started using Python 3, so dropping 2 wouldn't affect much users. Do you want to make a pull request for it.

[sils]

Ok so for now we have only one branch for python 2 (dict.items vs iteritems) and dropping it isn't worth it but being open to this decision is good and when it gets more complicated we can do it.

[Cretezy]

Is this done?

[sils]

I didn't actively drop python 2 support but I also might have introduced some python 3 code unknowingly, if we actively want to drop this we can put an assert somewhere and clean up the little Python 2 code which is around to give people a good reason not to start writing their bot in python 2.

[madEng84]

Oh no... I'm ready to use your chatbot for my python2.7 project. I will tell you if i'm encountering any problem in the integration. Elsewhere i will try to port my big django project in python 3+

[Cretezy]

Alright well let's try to keep Python 2 instead!

[madEng84]

Thanks, i hope i will help you quickly :D