upgrade to version 0.27. alignment with xotcl-core 0.38 (use cr_item.name instead of cr_revisions.title), change page_title to title (potential incompatibility) to rely more strictly to the CR data model (most files are effected).
improved category display (faster, much less SQL queries, tree-style and plain style, opening tree automatically for a specified page), improved and unified CSS and JS handling (requireCSS and requireJS)