Support for Python 2.7

[kayabe]

No description provided.

[kayabe]

could you check out if something is wrong with these commits on python 2.7?

[igorcmoura]

Really thank you for your contribution!
In general it works, but there are some little problems.

[igorcmoura]

The tests fail for python 3 because of the removal of tests. on the imports. You could keep it and it would still works on python 2.7 if you used the discover argument to run unittest.
With this little fix, python 3 passes all tests, but python 2 fails in some, all because of unicode problems. To fix this you just have to import unicode_literals from __future__ in all files (except __init__.py) to convert all strings to unicode. As demonstrated here.

[igorcmoura]

Importing unicode_literals you can remove this unicode conversion.

[igorcmoura]

And also this

[igorcmoura]

And I think that's all to be fixed!

There are also some improvements you can do. If you don't want to, no problem, I can do it later:

• Use absolute imports instead of relative. Absolute imports are the newer python versions' default and they are more readable than relative. To use absolute imports on python 2 you have to import absolute_import from __future__ as demonstrated here.
• The fullmatch method is equivalent to adding a $ to the end of the pattern. So you can do this and use re.match.

[kayabe]

could you check again?

[igorcmoura]

Everything seems perfect!

I gonna merge and release a new version as soon as possible.

[kayabe]

Thanks