PHP7, SSL support and others

【Contents of revision】
■Support for PHP7
■Support for SSL
■Fixed an error that sometimes appears in the theme options screen.

The following files have been modified for this update.
【Fixed files】
admin/theme-options.php
widget/ad.php
widget/google_search.php
widget/news_list.php
widget/product_list.php
widget/product_list2.php
widget/recent_post.php
widget/recommend_product_list.php
style.css

For more information, please visit the download site for purchasers of Precious (tcd019).

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