Some changes which are needed for the code to work on both Python 2 and 3

[bharatr21]

Some changes which were made, along with changes to the requirements file

Relevant issues: #18, #35 , #39

Closes #18 , #35 and #39

Numpy version has to be changed otherwise it throws numpy.ufunc has the wrong size, try recompiling error.

Similarly, Gensim has to be updated to remove the DeprecationWarning: Deprecated. Use model.wv.save_word2vec_format instead. error