Mlconjug3

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* Fixed bug in issue 80 and 81 reported by rongybika and NoelHVincent.
* Added new option '-o' to the CLI allowing to specify output file to save results to json file.
* Use logging instead of print() whenever appropriate.
* Use joblib for model persistence instead.
* Updated Type declarations.
* Added more tests in the test-suite.
* Implemented results_parser to select and train the best performing models.
* Implemented multicore grid search.
* Display prettier output in the CLI.
* Updated scikit-learn dependency.
* Updated other dependencies.

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* Fixed bug when verbs with no common roots with their conjugated form get their root inserted as a prefix.
* Added the method iterate() to the Verb Class as per poolebu's feature request.
* Updated Dependencies.

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* Corrected bug with regular english verbs not being properly regulated. Thanks to vectomon
* Updated Dependencies.

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* Corrected bug when updating dependencies to use scikit-learn v 0.20.2 and higher.
* Updated Dependencies.

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* Updated Dependencies to use scikit-learn v 0.20.2 and higher.
* Updated the pre-trained models to use scikit-learn v 0.20.2 and higher.

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* Updated Dependencies.
* Fixed bug which prevented the installation of the pre-trained models.