Python 3

[kyleabeauchamp]

At some point it might be nice to support python 3. This may be a easy as running futurize (http://python-future.org/futurize.html) on all of the python scripts, adding some manual corrections, and then testing. Or it may be slightly more complex.

[jbedo]

Porting to python 3 is important to us, with python 2 deprecated nixpkgs is looking to remove python 2 from the package tree (NixOS/nixpkgs#148779).

[serge2016]

Hope to see this update!!!