old_contents: from setuptools import setup, find_packages
  
  setup(
      name="regcore",
      version="2.0.0",
      license="public domain",
      packages=find_packages(),
      install_requires=[
          'django>=1.8,<1.9',
          'jsonschema',
          'six'
      ]
  )
  
new_contents: from setuptools import setup, find_packages
  
  setup(
      name="regcore",
      version="2.0.0",
      license="public domain",
      packages=find_packages(),
      install_requires=[
          'django>=1.8,<1.9',
          'django-mptt',
          'jsonschema',
          'six',
      ]
  )
  
subject: Add django-mptt requirement to setup.py