Code style improvements from the reviews of * Rename ´$serendipity['title_first'´] to ´$serendipity['backendBlogtitleFirst']´ and make it boolean * Add default to `serendipity_config.inc.php`. * Change the condition in ´2k11/admin/index.tpl´ that the first branch is run by default Signed-off-by: Thomas Hochstein <thh@inter.net>