* [DIR_EXT,SC] Removed file_to_directory/2. Use file_name/4 instead.
* [FILE_EXT,EXT] file_name/4 now works with HTTP `file://` paths.
* [FILE_EXT,EXT] file_name/4 now works with paths that are directories.
* [RDF_SERIAL,FIX] rdf_save/3: Uninstantiated file that cannot be retrieved from a given graph name either now throws an instantiation exception.
* [VOID_DB,SC] Added void_dataset_location/3 and void_dataset/2, providing generics for the other VoID modules.
* [VOID_FILE,EXT] Simplified code. Tested loading/saving.
* [VOID_STAT,EXT] Codebase updated to new VoID implementation.