N64 improvements, save files (#859)

N64 improvements. Split N64 save files into eep, sra, fla, mpk and tpk files.
Add "wide" tag detection to database, auto-switches to widescreen if found.
Prioritize N64-database_user.txt, so that people can override games already in the regular database file.
Honor order that rpak, cpak and tpak are written in database, for p1 controller.

file_io.cpp

@@ -814,7 +814,7 @@ int FileCanWrite(const char *name)
 	return ((st.st_mode & S_IWUSR) != 0);
 }
 
-static void create_path(const char *base_dir, const char* sub_dir)
+void create_path(const char *base_dir, const char* sub_dir)
 {
 	make_fullpath(base_dir);
 	mkdir(full_path, S_IRWXU | S_IRWXG | S_IRWXO);