SSL, PHP7 support, etc.

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

The following files have been modified for this update.
【Fixed files】
admin/theme-options.php
languages/en.mo
languages/en.po
widget/ad.php
widget/category_list.php
widget/menu.php
widget/news_list.php
widget/product_list.php
widget/recommend_post.php
widget/recommend_post2.php
widget/styled_post_list1.php
widget/styled_post_list2.php
functions.php
style.css

For more information, please visit the Canvas(tcd017) download site for purchasers.