Fixed multiple bugs/added new features

【Contents of the fix】
■Fixed a bug that the image selection button may not appear in the image slider of the custom post “Shop”.
■Fixed a bug that the “Map Saturation” cannot be set to “0” in the custom post type “Eat”.
■Adjusted the style of the input field for theme options.
■Implemented custom script function.
■SSL support

The following files have been modified for this update.
【Fixed files】
admin/css/my_admin.css
admin/inc/basic.php
css/responsive.css
functions/head.php
functions/shop_cf.php
languages/ja.mo
languages/ja.po
style.css
widget/google_search.php