Python 3.x compatibility

[tscheepers]

Fixes #4

• Added a setup.py file to allow for installation through pip.
• Added __future__ imports
• Replaced open with compabible io.open
• Added checks for torch.cuda.is_available()
• Moved package contents into folder senteval (This is required for pip installation)
• Fixed some whitespace inconsistencies

Tested on bow.py with Python 3.5 and 2.7. Exactly the same numbers roll out.

You can test it using pip install git+https://github.com/tscheepers/SentEval.git@setuppy

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[aconneau]

Merged in 94a41b41c1f13dbd58d30ff271e7867156d8f61d Thanks for your contribution!

[aconneau]

After "pip install git+https://github.com/facebookresearch/SentEval" (which works fine), I obtain the following error when trying to import senteval in a python shell:

import senteval Traceback (most recent call last): File "", line 1, in File "/home/aconneau/anaconda/lib/python2.7/site-packages/senteval/init.py", line 3, in from .senteval import SentEval File "/home/aconneau/anaconda/lib/python2.7/site-packages/senteval/senteval.py", line 15, in from binary import CREval, MREval, MPQAEval, SUBJEval ImportError: No module named binary

[tscheepers]

@aconneau I see, I'm fixing it right now