Fixed multiple bugs

【Contents of fixes】
■SSL support for Google Custom Search Widget
■Fixed an error that may occur in PHP7 environment.
■Fixed an error that may appear in the theme options screen.
■Fixed an error in the theme options screen.

The following files have been modified for this update.
【Fixed files】
admin/theme-options.php
functions/head.php
widget/ad.php
widget/category_list.php
widget/fixed_ad.php
widget/google_search.php
widget/styled_post_list1.php
widget/styled_post_list2.php
widget/user_profile.php
style.css

For more details, please visit the MAG(tcd036) download site for purchasers.