Fixed bugs and added/updated configuration functions

【Contents of the fix】
■Added OGP setting function to theme options (Facebook/Twitter).
■Fixed a bug that caused loading errors for invalid js files (modernizr.js).
■Updated the social button setting function.
　※This update eliminates the need to set up a Feedly account.

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
functions.php
functions/head.php
header.php
languages/ja.mo
languages/ja.po
sns_btn_btm.php
style.css
【Added files】
functions/ogp.php

For more information, please visit the download site for purchasers of VIEW(tcd032).

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