Support Python 3

[chrisbrickhouse]

Python 2.7 has been retired in favor of Python 3. This pull request implements FAVE in Python 3 along with a number of improvements to code style and code documentation.

• Modularization
  • FAAValign and FAAVextract have been moved to modules fave.align and fave.extract respectively
  • The shared dependencies of praat.py and cmu(dictionary).py have been merged and moved to the root module directory as fave.praat and fave.cmudictionary respectively
  • Praat scripts have been moved to their own directory fave/praatScripts
  • fave.extract configuration files have been moved to the fave/extract/config directory
  • Wherever I noticed, references to package resources like praat scripts, config files, and default dictionaries have been replaced with pkg_resources which is a system and implementation independent way of accessing these files
  • fave.align has cross-module logging using the standard logging library allowing users to specify verbosity in a more fine-grained manner
  • Because of the above, end users must run python -m pip install -e /path/to/FAVE/directory or python -m pip install /path/to/fave/wheel/file so that the modules can work together appropriately
• Packaging
  • The repository is set up as a standard PyPI package including automated package building and dependency management using poetry
  • Python package distributions in tar.gz and .whl are included and may be installed by end users with python -m pip install fave-2.0.0.dev0-py3-none-any.whl
  • An eventual goal is to distribute these via the Python Package Index so end users can run pip install fave from any machine
• Documentation
  • Code documentation is automatically generated using Sphinx An example can be seen at https://chrisbrickhouse.github.io/FAVE
  • Commits to master automatically build documentation and publish it to github pages.

[chrisbrickhouse]

Incidentally, this also fixes #46