WB 2.08.x

! update revision properties for all files
- include/Sensio/Twig remove Version 1.13.2

The second runtime optimization of PageTree by recoding /admin/pages/index.php
Added new class a_pages_PageTree() for use with /admin/pages/index.php

! update folder admin/pages, admin/skel/htt
! change multi-dimensional arrays (variables) to similar arrays
! change default templates, change code to new templates

+ move admin/themes/templates/ to admin/skel/themes/htt/
! and update class.wb.php, upgrade-script.php