Types: switch from content_icon to icon_expr.
Types: folder_localrole_form -> @@sharing
title for upgrade step
Remove ancient i18n utils and compile-locales.sh.
Add missing closing div in tutorialpage_view.pt.
Move i18n/plonehelpcenter*pot to locales/
po files should not be executable.
phc_asearch_form.pt: put the i18n:translate on the labels instead of the empty inputs.
Fix double definition of phc_rss_all.
Add i18n:domain plonehelpcenter to our types in GenericSetup.
Add update_locales.sh script.
Update locales.
Minor Dutch update.
check-manifest: ignore *cfg and bootstrap.py when checking our sdist.
Remove definitions for some actions from our types.

I don't think they actually get removed when upgrading, but that is okay.
Anyway, we do not need these tabs, for example History is replaced by a link in the document byline.
Removing: References, History, External Edit, Folder Listing.
Compatible with Plone 4.2 and 4.3.
Preparing release 4.0
Back to development: 4.0.1
Include missing xmlns declarations in pages templates
Fix some i18ndude warnings