create file handles
unravel_file_load
UHandle *unravel_file_load(char *path);
unravel_file_save
UHandle *unravel_file_save(char *path);
unravel_file_size
uint64 unravel_file_size(UHandle *handle);
unravel_file_position_set
void unravel_file_position_set(UHandle *handle, uint64 pos);
unravel_file_position_get
uint64 unravel_file_position_get(UHandle *handle);