pass in tmp array for likelihoods
added function to compute progenitor orbit
first pass at implementing importance sample shitre
added a function to compute de
added test for observational errors
fix likelihood call with obs errors
change number of stars
test different number of samples in importance sampling approx
fix bad paren
major refactor
wrap in nogil
openmp to compiler args
compute log prob for samples
refactor and nogil
sum over correct axis
plot test and many stars test