Manipulate cached data on the file systems
Value
cache_root
returns the root path that stores the 'RAVE'
cache data; clear_cached_files
returns nothing
Details
'RAVE' intensively uses cache files. If running on personal
computers, the disk space might be filled up very quickly. These cache
files are safe to remove if there is no 'RAVE' instance running.
Function clear_cached_files
is designed to remove these cache files.
To run this function, please make sure that all 'RAVE' instances
are shutdown.