This PR takes care of initial values setting for chains.
The t and p_outlier parameters will consistently start at a very low value to pre-empt computational issues with gradients on the analytical DDM likelihood
The nuts_numpyro sampler setting now respects initial values and jitter can be turned off
Strange prior settings when log_logit links were chosen are now fixed
Convenience function is added to allow manual jittering of starting points
Default group distribution of t parameter changed to Gamma distribution
tandp_outlierparameters will consistently start at a very low value to pre-empt computational issues with gradients on the analytical DDM likelihoodnuts_numpyrosampler setting now respects initial values and jitter can be turned offlog_logitlinks were chosen are now fixedtparameter changed to Gamma distribution