RAM is still accessible with the RAM table, however, as a metatable is
used to ensure that whenever information is set in the RAM table it is
automatically stored in the metadata, and to ensure that functions and
userdata is not stored.
* Separate custom function definitions from make_env for better
readability
* Add newlines between functions
* Make comments more descriptive
* Move `Settings()` API to `fs.read_settings()`
