andrew/split — pull request #177 by joeroot (2013-06-25 14:08:50+00:00)
Title: Stores and parses Experiment's start_time as a UNIX integer.

Currently, an Experiment's start_time is stored using Time's to_s method. If this is overridden, parsing fails when the date is later retrieved. Instead, I suggest using UNIX integer timestamps. Though UNIX integer representations are used, they are stored as strings and are backwards compatable with prior representations.