lift/framework — pull request #1468 by japgolly (2013-07-01 13:12:06+00:00)
Title: Move Mailer's inner classes from trait to object.

Allows any class extending `trait Mailer` to accept the same instances of `From()`, `To()`, `Subject()`, etc.
This in turn allows for easier testing & mocking of `Mailer`.

https://groups.google.com/forum/#!topic/liftweb/HtBCb1XmmU4