Fix python version detection in release script.
Fix in release script.
Update reference data pointer to 100e90341a6ff402b68c3c3d94f1d4436ed2aa98.
Another minor fix in release script.
Update version number to 1.4.0.
Update version number to 1.4.0+.
Update reference data pointer to 616ce4b51a55d80bbffbc8930e1be68b53372050.