switch distutils->setuptools and tostring->tobytes

Update README.rst to fix outdated URLs again

Update README.rst to repair outdated URLs

Bumped version to 1.6 to force some automatic updaters to recognize small change

change np.complex_ to np.cdouble for numpy 2.0

bumped version to 1.5

fixed race condition that caused quit command to fail

correct previous commit to still support python 2.7

Merge pull request #2 from trmwzm/master

fix collections import

Typo, is_file fix.

bumped to version 1.4

updated DESCRIPTION.rst to cover ypickling

added automatic pickling feature, ypickling function

fixed spelling in README