Fixed display bug and style adjustment of article detail page ads

【Contents of the fix】
■Fixes to resolve errors in php7 environment.
■Added the setting item of the recommended article to the post list screen > quick edit.
■Apply microdata structured markup recommended by google to breadcrumb list code.

The following are the files that have been modified for this update.
【Corrected files】
404.php
admin/theme-options.php
archive-news.php
archive-ranking_post.php
archive-ranking_post2.php
archive-ranking_post2.php ・archive-ranking_post3.php
archive.php
function.php
page-noside.php
page.php
search.php
single-news.php
single-ranking_post.php
single-ranking_post2.php
single-ranking_post3.php
Single.php
style.css
style_sp.css
【Added files】
breadcrumb.php
fonts/design_plus.eot
fonts/design_plus.svg
fonts/design_plus.ttf
fonts/design_plus.woff
functions/quick_edit.php

For more information, please see the download site for purchasers of Reviewer (tcd026).