updating stan to feature/refactor-common-run_markov_chain
updating makefile
added feeler tests for mcmc_output; added funciton to inspect state of the object
trapping more current behavior
recording what mcmc_writer in Stan does
updating tests to use the refactoring and updating stan
updating branch
updating mcmc_output_test
reading serialized data back for stan_args
adding more config
moving files, recorded output
adding tests for holder.
updated test to read from file fully
added a second test
removing extraneous prints
fixed tests, starting to put in values of holder
fixing test
updating test
got the refactoring to work for some of the tests\!
adding test that calculates mean_pars and mean_lp