Add better multi-byte character support - New dependency: mbstring extension

README

@@ -35,7 +35,7 @@ And more
 
 INSTALLATION INSTRUCTIONS:
 
-You'll need to have php with pdo, pcre and date extension and a web-server installed.
+You'll need to have php with pdo, pcre, mbstring and date extension and a web-server installed.
 You will also need the pdo_sqlite, pdo_mysql or pdo_pgsql extension, depending on which database you choose.
 Optionally, you can install:
 - the gd extension for the captcha feature