Changes

# Florian Quèze ({{mozillians|florian}}) <florian@queze.net>: Module owner for chat.

# Joe Sabash (:JoeS1) <jsabash@bellatlantic.net>: Thunderbird builds thread, testing nightly builds, release testing.

# Kai Engert ({{mozillians|kaie}}) <kaie@thunderbird.net>: Security, Privacy, S/MIME, NSS.

# Khushil Mistry <khushil@thunderbird.net>: Front-end team, composition, editor, refactoring.