v2.2.1 [YANKED]

Changed

• Do not allow orientation = None in Transform objects
• Improve documentation for territory__*.
• Improve scenario tags.
• Move puppeteers testutils to testing dir.
• remove restriction on chex
• Update setup.py to work with older versions of setuptools
• Add dev tools to setup.py
• Add pytest-xdist as a required plugin.
• Update pylintrc

Fixed

• Debug observations break hidden agenda #168
• Various lint errors

Removed

• Residual v1 file: reaction_graph_utils.py
• Remove stale documentation left over from 1.0.