Support python 3

[jakul]

[marciomazza]

Please.

[insolor]

If someone need it, there are several forks of python-transifex which support python 3 (including mine):

• abendleiter/python-transifex
• insolor/python-transifex
• opengisch/pytransifex (not a direct fork)

[3nids]

here is an available package for Python 3.6+: https://pypi.org/project/pytransifex