Fixed bugs and added functions

【Contents of fix】
■Favicon setting function added.
■Fixed a bug in the card link function
■Fixed a bug in the brand page and slider.

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
functions/head.php
languages/ja.mo
languages/ja.po
functions.php
header.php
style.css

For more information, please visit the VENUS (tcd038) download site for purchasers.