[FIX] Timetable display in session details view
[IMP] Added material descriptions in many places

- conference (meeting) display page
- conference timetable page
- conference material display page
- contribution/session details display page

- closes #404
[IMP] Small code formatting fixes

 * see #404
[FIX] Misspelled withdrawn
[IMP] Change judgement to assessment.

- Also delete "Final" because it was meaning something that was not possible to change.
[FIX] Referee judgment style fixing
[FIX] Tab error if not paper reviewing
[IMP] Add notification to referee

- When editor or reviewer makes an assessment.
- Also send mails to speakers when send to the authors
- Added progress dialog in assign papers.
- Deleted unused code.
[IMP] Material filter assign papers

- Now we can filter by if the paper has material or not submitted.
- Also refactored assign status making an 'or' of the conditions
[REF] Refactoring some code and fixing some layout issues
[IMP] Improved the 3 list of papers

* for referees
* for layout reviewers
* for content reviewers
[FIX] Added new link for maps at CERN

* This will need to be refactored and moved out to a parameter
[REF] Little refactoring on PR and fix email authors
[FIX] No need to remove mat from contrib when new Review
[FIX] Track conflict when judgements are different

- added last reviewer proposition
- added review statuses decriptions to UserGuide
[FIX] Rewritten review unit tests
[IMP] Added unit tests for abstract judgement

* refactoring judgement methods a bit
- closes #1024
[MIN] Not necessary checking in PRM
[FIX] Send email only to submitters in PRM

* When a reviewer, editor or referee does an assessment and the notification is enable, an email is
sent, but only to the submitters, not to all the authors and speakers.
[FIX] Column swap in TT

 * Swapping columns was destructive;
 * Fixes problem introduced by c1161884663e24fe8b5ddb4216bdf10cdeae96e4;