Add dependency on cl
* lisp/ox-linguistics.el: require 'cl for `labels'
Tiny changes.
* lisp/ox-linguistics.el: file header comment;
  quick-fix for problem with :latex-hyperref-p in new exporter
Add support for tags in linguex items
* lisp/ox-linguistics.el: (org-linguistics-linguex-item): add in tag-cmd
Add support for tags in gb4e items
* lisp/ox-linguistics.el: (org-linguistics-gb4e-item): support \exi
  command through list tags