Removed import of the unicode_literal for all files. This will be added back only when h5py is fixed.

Changed how we define custom dtypes to work when import unicode_literals from __future__

Importing all necessary functions to ensure python 3 compatibility for all notebooks and package files.
Note - Extensive testing is pending

Updated to new Translator class method requirements

Translator now store the noise floor as a compound dataset
Still needs to be tested

Words are split with an underscore now

Cleaned up more print statements and CamelCased the class names, etc.