got RealGalaxy and InterpolatedImage tests passing, made the RNG supplied on input take precedence over any found in a user-input correlation function
(#352)
EXPERIMENTAL commit trying to use the drawK method for generating noise on square input images... Getting artifacts at the moment, further investigation warranted, will revert this but wanted to store it in the repo for later...
(#352)
Revert "EXPERIMENTAL commit trying to use the drawK method for generating noise on square input images... Getting artifacts at the moment, further investigation warranted, will revert this but wanted to store it in the repo for later..."

This reverts commit 7ebfe0202bab1a3f070ea97f172a557431d7bd51.