rename example files
add mico files to project
mico compiles
update makefile
remove sample function
rename sample_d to banmi_sample
remove unused cumsample_d code from banmi_util
add static keywords to nonexported functions in banmi_util.c
rename ordering functions
rename ordering functions in mico.c
add static keyword to non-exported functions in banmi.c
start implementing steps in mico model
fix formulas for hyperparameters sigma_a, sigma_b
continue fleshing out mico.c