* [DIR_EXT,NEW] New implementations for deleting and copying directories with a safe/1 option.
* [DIR_EXT,FIX] Reworte directory_files/3 to solve some long-standing issues with non-included files. Also added include_self/1 as an option.
* [FILE_EXT,SC] Added file_type/2 as a wrapper around file_type_name/3.
* [FILE_EXT,FIX] New implementation for file_type_name/3 that also works for extensions that are not registered with a type.
* [HTML_PL_TERM,EXT] Simplified HTML generation for property values.