This commit fixes the "relaxed" dependency constraints, that do not
allow sg_jobs to be installed alongside sg-seo 1.1.3 for example

This commit adds a limit to the language of the job into the department
select field. This way no departments can be selected, that are not the
same language as the job itself. It also adds a sorting to make the
list easier to read.

This commit solves a problem with jobs that do not have a department
set

Feature departments

See merge request !10

[TASK] Refactored mail template registration, moved template content to config file

See merge request !8

# Conflicts:
#   ext_localconf.php

This commit adds a new field and a new record type, the department.
It comes as a replacement for the area text field and allows for
department records to be created. This also introduces a migration
wizard, that can create new departments out of the old area entries.