Version 1.3.0

Bug Fixes: Praat

• Fix Praat pitch shifting to actually work and remove the age adjustment so
  it only shifts based on the target pitch.
• Change Praat script to take the full output directory and filename as an
  argument.
• Decrease maximum Praat duration scaling.

Bug Fixes: entrain_speech_node.py

• Declare is_participant_turn global before assignment.
• Make pylint and flake8 happier: Fix invalid variable names, indent arguments
  to functions properly, change capitalization of constants, and that sort of
  thing in entrain_speech_node.py
• Fix viseme file time adjustment to scale properly.
• Add a missing import.