Added features/fixed multiple bugs

【Contents of fixes】
■Added the ability to rotate images (on the image submission screen).
■Added the ability to turn off the oEmbed function for the URLs of your own and other sites.
■Fixed a bug where the posted image was flipped left and right.
■Fixed a bug where pictograms were not reflected correctly.
■Fixed some minor bugs.

【Fixed files】
admin/theme-options.php
fonts/design_plus.eot
fonts/design_plus.svg
fonts/design_plus.ttf
fonts/design_plus.woff
functions.php
functions/head.php
functions/membership/blog.php
functions/membership/frontend.php
functions/membership/inc/blog.php
functions/membership/inc/photo.php
functions/membership/main_image.php
functions/membership/options.php
functions/membership/photo.php
functions/membership/user_profile.php
js/membership-upload.js
languages/ja.mo
languages/ja.po
style.css