pallets-eco#222 ported to current code

Merge pull request pallets-eco#561 from davidism/sti-unset-table

don't mask parent table on single-table inheritance

release 2.3.1

release 2.3.0

release version 2.2

Update README

Bump version number to 2.0

Changed version number in setup file

Updated docs

This is 0.15