Add support for Python 3.x

[svisser]

If I'm not mistaken the following steps are sufficient to have this package publicly support Python 3.x:

• Add PyPI classifiers in setup.py for the setup() call (such as https://github.com/svisser/logaugment/blob/master/setup.py#L31-L37) to indicate 3.x support.
• Package a new release to ensure that the above change plus this change are included.
• Upload to PyPI.

I'm not sure what Python versions you're willing to support but these changes should be all (I have tested the package already in 3.x).

[frabcus]

:+1:

[afedosenko]

+1

[jsvine]

+1

[whyscream]

+1

[michi88]

+1

[edwardotis]

+1

[manugarri]

jumping on the :+1: wagon

[Evlos]

+1

[megabotan]

+1

[adammenges]

👍 👍 👍

[xingfanxia]

need this!