rubber/rubber — pull request #280 by zmillman (2013-02-12 02:35:37+00:00)
Title: Refactor serial_task

Added handling for lambdas in role definitions and rewrote the slice-building logic to
use ruby idioms.

There was also an issue with getting roles from the wrong namespace
(self.roles vs top.roles) in allow_optional_tasks and serial_task (line
94). Fixing this would resolve issue #279