Relative path parent breaks on ``IPloneSiteRoot`` rather than ``INavigationRoot``. Path criteria can be defined either absolute to ``IPloneSiteRoot``, absolute to ``INavigationRoot`` or relative to current context.
add navigation path criteria tests
sort imports
add migration step
fix operation identifiers to keep prior absolute path behavior sane when upgrading
navigationPath operation is original path operation
Merge pull request #29 from plone/rnixx_inav_root_and_i_site_root

Path query can be relative, absolute from navigation root and absolute from site root