Define settings that modify the behaviour of the rbmi package
Each of the following are the name of options that can be set via:
options(<option_name> = <value>)
rbmi.cache_dir
Default = tools::R_user_dir("rbmi", which = "cache")
Directory to store compiled Stan model in. If not set, a temporary directory is used for
the given R session. Can also be set via the environment variable RBMI_CACHE_DIR.