Reword the change about dx -> scale to include old draw, drawShoot, drawK
(#535)
Minor CHANGELOG edits
(#535)
Add reference to alias_threshold when talking about auto image creation catching 99.5% of the flux.
(#535)
Move GSParams doc to python layer for easier editing.  Also expand some items to be more informative
(#535)
Merge shoot_relerr and shoot_abserr into integration_relerr and integration_abserr, and make that 1.e-6, 1.e-8.
(#535)