Base composite class to have breadcrumbs in summarised reports
Fix indentation
Summarised report works again

* Refactor summarised graphs to use common graph.mas template
  (all graph in the same template)
* Use size to know if a model has data in modelViewer. This makes
  easier to overload Graph models to work nicely
* Do not pop last value in graph as nan are not displayed in anyway.
Summarised report table now can be paginated
Use DATETIME type in date column in consolidation tables
Added migration to have the proper type to date in consolidation tables
Merge branch 'master' into ejhernandez/summ-logs

Conflicts:
	main/core/ChangeLog
	main/firewall/ChangeLog
	main/ips/ChangeLog
	main/mailfilter/ChangeLog
Set current version to run migration just once

Although the migration is idempotent
Merge branch 'master' into ejhernandez/summ-logs

Conflicts:
	main/core/ChangeLog
	main/ips/ChangeLog
Merge pull request #605 from Zentyal/ejhernandez/summ-logs

Fixes to summarised reports