Fix call to deprecated function

Hello,

thanks for the new version! I was a bit disappointed that it didn’t address the problem that has been reported several times already.

I noticed the plugin still supports WordPress 3.0, but it’s easy to fix the issue for all versions (also older than WordPress 3.5 where the gd_edit_image_support has been deprecated in favor of wp_image_editor_supports):

function ime_filter_media_meta($content, $post) {
	global $wp_version;

	if (!ime_mode_valid())
		return $content;

	if (version_compare($wp_version, '3.5.0', '>=')) {
		// WordPress 3.5 and newer
		if (!wp_image_editor_supports(array('mime_type' => $post->post_mime_type))) {
			return $content;
		}
	} else {
		// WordPress older than 3.5
		if (!gd_edit_image_support($post->post_mime_type)) {
			return $content;
		}
	}

	// Rest of the function follows...
	[...]