WebComment: comment moderation and improvements
WebComment: comment moderation and improvements

* Comments marked as deleted in DB instead of complete deletion

* Links to moderate a comment while viewing the record if logged in
  as moderator

* Admin interface. Connected user only sees information about the
  collections he/she is moderator in

* Definitive admin approval. Do not show report abuse link
  once the comment has been accepted

* Washing of comments coming from plaintext editor

* Washing and formatting of emails sent to moderators

* LaTeX/JSMath in comments

* UI changes in comments page

* Option for author own deletion of comments

* Web test for deleting and reporting comments

* WebComment Admin Guide updated

tiborsimko/invenio-access,inveniosoftware/invenio-access,tiborsimko/invenio-access,inveniosoftware/invenio-access