Recursive ACF shortcode

acfgetfieldrecursive Adds 'acfrecursive' shortcode for use with Advanced Custom Fields (ACF) This plugin adds a shortcode for use with Advanced Custom Fields (ACF) that works like the 'acf' shortcode (e.g., calling getfield()); however, if the requested field is empty, the parent of the given post will be examined for said field. If the parent doesn't have a value, its parent (i.e., the post's ancestors) are each examined until either a value is found or there are no more ancestors to call. If nothing is found in the post or any of its ancestors, false is returned. This was originally based on Jacob Rudenstam's Github Gist posting "get-field-recursive.php" at https://gist.github.com/jrudenstam/7551729