commit 2014.07.30
* added the check for the metabox plugin (all files were there, but had forgotten to build the check for it in)
* get rid of ob_end_flush() error that sometimes occurs
* tested up to WP 4.0-beta-2

git-svn-id: https://plugins.svn.wordpress.org/so-simple-gallery/trunk@957237 b8457f37-d9ea-0310-8a92-e5e31aec5664