- self.varmaker is now defined on self._cw
- self.initialize_varmaker is not required anymore

[views] ticket #474762, login link next to comment redirect to the login popup and does not leave the current page

        adding a comment

         comment if it has the permission to do it

[views] ticket #154096, propose delete action for user who has permission to delete and only on comments who do not have comment children

[views] ticket #343859, improved RSS view of a comment adding a link in the description to the entity the comment comments

[views] ticket #342902, propose to login or register depending on context when anonymous want to post comment