Import Error

Hello,

I am running on python 3.6 and after installing it, I run `import unirest` and get the following errors:
```
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\EOdianosen\AppData\Local\Programs\Python\Python36-32\lib\site-packages\unirest\__init__.py", line 98
except urllib2.HTTPError, e:
^
SyntaxError: invalid syntax
```
Please any thing I might be missing?

Thanks

Start with unirest/__init__.py at line 98 and reproduce the import under Python 3.6. Trace the surrounding import path and verify the package can be imported successfully on that Python version when the issue is resolved.

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