python 2 and python 3 compatibility fixes

[adnanyaqoobvirk]

I have faced few errors while running vcli in python3.3, I have fixed them to the best of my knowledge. I have tested it on both python 2.7 and python 3.3 and it is working.

[eliangcs]

vertica-python, which vcli depends on, does not support Python 3, so I don't think you can run vcli on Python 3 without modifying vertica-python. Did you change vertica-python?

[adnanyaqoobvirk]

Yes, I did and I have submitted the pull request here:

https://github.com/FredrikAppelros/vertica-python

Who has done most of the work porting the vertica-python for python3. If his pull request get's accepted in the main repository then the python3 support will be available officially. However, changes in this pull request ensures that this module is compatible with both python 2 and 3.

[eliangcs]

I see. I think we can merge this pull request after vertica/vertica-python#91 gets accepted.

[eliangcs]

vertica-python just released 0.6.0, which supports Python 3! I'll merge this PR, but it needs more work to make the tests pass. We'll also need to update .travis.yml and setup.py.