Fixed bugs/added custom script function

【Contents of the fix】
■Fixed a bug in the TCD theme options where the wording of the “Activity Results” setting was “Activity Report”.
■Added custom script function in the basic settings of theme options.

The following files have been modified for this update.
【Fixed files】
admin/inc/achievement.php
admin/inc/basic.php
admin/inc/front_page.php
functions/head.php
languages/ja.mo
languages/ja.po
style.css