Multiple bug fixes

【Contents of fixes】
■OGP tag optimization
■Changed Facebook OGP setting from old specification (fb:admins) to new specification (fb:app_id).
※Please refer to the following article about how to get “fb:app_id” (application ID).
 How to get the fb:app ID required for Facebook OGP settings
■Widget “Popular Articles List (tcd version)” specification change
(Changed from tallying accesses from articles published during a set period to displaying all articles in order of accesses within a specified period)
■Minor fixes to support the jQuery version.
■【Mac】Fixed a bug in which Japanese and European characters were displayed with different thickness when using some fonts.
■Fixed an error related to the login judgment in the comment section.
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change.
■Removed “Google+” from the social button settings.

The following files have been modified for this update.

【Modified file】
admin/js/cf-media-field.js
admin/theme-options.php
comments.php
editor-style-01.css
editor-style-02.css
functions.php
functions/ogp.php
functions/seo.php
japanese.css
languages/ja.mo
languages/ja.po
sns_btn_btm.php
style.css
widget/popular_post_list.php

【Added files】
functions/views.php