Merge pull request #577 from carragom/1.1.x

Update postfixadmin migration code
Migration script is now a regular management command.

see #577
Minor fixes in the pfxadmin migration script.

see #577
Domain/mailbox creation control when importing from LDAP.

see #591
Translation files updated.
Avoid backtrace display on domain conflict.

fix #591
Do not use translated content.

fix #598
Domain conflict check fixed.

see #591
New map file.

see #599