kiji-express: EXP-197. Add support for sequence file Input/Output sources in the Modeling Lifecycle.

issue: https://jira.kiji.org/browse/EXP-197
review: https://review.kiji.org/r/1163
commit: https://github.com/kijiproject/kiji-express/commit/22b24c31eb17f4b46c02572bb3b97c58b2c70752