Current version not compatible with Python 3.3 and higher

[nicolargo]

As for the forked project (rockymeza/wifi#116), Pyiw is not compatible with Python 3.3 or higher.

Here is the issue:

Python 3.6.7 (default, Oct 22 2018, 11:32:17) 
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyiw.scan import Cell
>>> c = Cell.all('wlp2s0')
>>> print(c)
<map object at 0x7f06bfb72198>
>>> c[0]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'map' object is not subscriptable
>>> c[0].ssid
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'map' object is not subscriptable

A patch is available here (for the Wifi lib): rockymeza/wifi@eee555b