Merge pull request #409 from intportg/dev

Dev
Fix Http\Web Events registration
Merge pull request #410 from inthause/documents

Fix Http\Web Events registration
[FIX] Use i18nAttr in template for localized attributes.
[NEW] Update default error templates to bootstrap 3 markup.
[FIX] Typo in error messages.
[NEW] Add XhtmlTemplate block in Website.
[NEW] Add temporary templates for some future blocks in demo theme and use them in page templates.
[FIX] Default website initialization.