3.19.90
=======
* Move linktrails stubs to common for all source formats to use
* Allow Mallard example to be a formal element with title
* Added html.js.script template for easier site overrides
* Don't force xref attributes on links in Mallard cache
* Updated translations:
  et    (Piotr Drąg)
  hi    (Piotr Drąg)
  is    (Sveinn í Felli)
  km    (Piotr Drąg)
  pt    (Piotr Drąg)
  si    (Piotr Drąg)
  sl    (Piotr Drąg)