six library is missing

[aruba8]

Tried basic example from README.md file.

Traceback (most recent call last):
  File "login_test.py", line 1, in <module>
    from selene.api import *
  File "/Users/erik/.virtualenvs/ui-tests/lib/python3.6/site-packages/selene/api/__init__.py", line 1, in <module>
    from selene import config, browser, browsers
  File "/Users/erik/.virtualenvs/ui-tests/lib/python3.6/site-packages/selene/browser.py", line 6, in <module>
    import selene.driver
  File "/Users/erik/.virtualenvs/ui-tests/lib/python3.6/site-packages/selene/driver.py", line 11, in <module>
    from selene.elements import SeleneElement, SeleneCollection
  File "/Users/erik/.virtualenvs/ui-tests/lib/python3.6/site-packages/selene/elements.py", line 23, in <module>
    from selene.wait import wait_for
  File "/Users/erik/.virtualenvs/ui-tests/lib/python3.6/site-packages/selene/wait.py", line 1, in <module>
    import six
ModuleNotFoundError: No module named 'six'

[SergeyPirogov]

Which command did you use to install selene?

[aruba8]

I used:
pip install selene --pre

pip freeze output:

backports.functools-lru-cache==1.4
certifi==2017.4.17
chardet==3.0.4
colorama==0.3.9
configparser==3.5.0
crayons==0.1.2
future==0.16.0
idna==2.5
requests==2.18.1
selene==1.0.0a11
selenium==2.53.1
urllib3==1.21.1
webdriver-manager==1.4.5

[SergeyPirogov]

Python version?

[aruba8]

python3.6

[SergeyPirogov]

Need to investigate, because we tested it with python <= 3.5

[SergeyPirogov]

Can confirm, that six is missed. Need to fix it. Temporary solution is to install it using pip install six

[SergeyPirogov]

fixed by #136