[FIX+IMP] document_page:

* Changed history widget to html.
* Improved views and added followers to pages.
* Updated document_page pot and es translations.
* document_page:^Cissing dependency.

document_page/__openerp__.py

@@ -33,6 +33,7 @@ Web pages
     'license': 'AGPL-3',
     'depends': [
         'knowledge',
+        'mail',
     ],
     'data': [
         'wizard/document_page_create_menu_view.xml',