Vocabulary

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- Fixed `setup.py` requirements.txt file not found issue by removing the logic to strip dependencies. Just a hack for now. Need to do it the older way.
- Fixed failing tests in travis due to older unchanged import of `vocabulary`

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- Fixed `setup.py` import issue
- API changes to importing the module
from vocabulary.vocabulary import Vocabulary as vb instead of from vocabulary import Vocabulary as vb

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- Added support for specifying response format
- Updated ``Vocabulary.pronunciation``, ``Vocabulary.antonym, Vocabulary.part_of_speech to return a list of objects with apprioprate index

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- Added `translate` module
- Improved Documentation
- Minor bug fixes

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- ``JSON`` inconsistency fixed for the methods

- ``Vocabulary.hyphenation()``
- ``Vocabulary.part_of_speech()``
- ``Vocabulary.meaning()``