fixed normalization issue in the kappa generation, still don't understand the sign of g1 in the KS expression though.  Still, it works.  Perhaps kx and ky are switched inadvertently?
(#304)
removed trig in generate spin weightings in case this was where floating differences artifacts came from, sadly not but should be faster...
(#304)
undid minor edit that had no effect
(#304)
fixed syntax error
(#304)
reinstated old sine cosine code (almost)
(#304)
saving snapshot of unit test
(#304)
hmmm exploring, still nothing...
(#304)