Within the trauma_performance() function, renamed the variable predicted_prob_death to scale_factor which is commensurate with the source literature.

updated comments in trauma_performance() for z_method method of the Z_score to reflect the right text

In trauma_performance(), completed the comment where the scale_factor is created so that it is complete and clear

Corrected a test error at CRAN from using bootstrap CI process in testing with 100,000 observations and 100 bootstrap samples to make sure rmm() and rm_bin_summary() ran in under 60 sec. That test now does not use the bootstrap process so the core function can be tested and will always run in under a minute with 100,000 observations.

Cleaned up other tests within for relative_mortality.R that were checking for correct error / warning handling where multiple lines of output were sent to the console. Built a custom function to deal with those scenarios and correctly perform those unit tests.