Removed old reference to stats plugin in doc.

Enable policyd for new deployments.

Updated setup.py

Good fix this time?

Changed message field type to TextField. (modoboa#1754)

fix modoboa#1743

Added 1.13.1 documentation.

Fixed modoboa#1636

Merge pull request modoboa#1599 from Toniob/scheme_fix

fix a bug with python3 showing no scheme available in settings

Added missing migration.

Merge pull request modoboa#1595 from modoboa/feature/quota_unit

Added support for unit when defining a quota.