Optimization of breadcrumb list and adjustment of theme options

【Fixes and additional features】
■Apply microdata structured markup recommended by google to the breadcrumb list code.
■Adjusted the display position of the breadcrumb list.
■Added the setting item of the recommended article to the post list screen > quick edit.
■Corrected the wording of theme options (updated the reference link for “Twitter cards”)

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
content-single.php
focus.css
footer.php
functions.php
functions/ogp.php
header.php
index.php
languages/ja.mo
languages/ja.po
masonry.js
style.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 details, please see the download site for FOCUS (tcd030) purchasers.