Python 3 support

[asmwarrior]

I made some changes for the Python 3 support, see my changes here:

https://github.com/asmwarrior/Simple-File-Server

I think there are still some other changes needed to fully support Python3

[RDCH106]

Thank you for your updates! I will check them.

I am going to prepare a branch for python3 full support.

[asmwarrior]

There are some similar projects which I see has compact code:
johann-petrak/python-tiny-http-server: A simple ad-hoc http server to serve static pages, optionally use basic auth and https

and

Densaugeo/uploadserver: Python's http.server extended to include a file upload page

Both of the two projects can be installed from the pip command.

Hope that helps.