Packaged vPhon for PyPI and added convert_line() function

[gerazov]

I packaged vPhon for PyPI and added a convert_line() function to be used from within Python.

I tested it on test PyPI, and you can give it a try like so:

pip install --index-url https://test.pypi.org/simple/ vPhon

Then within Python:

from vPhon import vPhon
vPhon.convert_line("Trong một cuộc", dialect="n")

If you approve you can push it to the official PyPI.

I also added my name as a co-author, but you can take it down if you think it's inappropriate ; )