kijiproject.github.com: EXP-402. Update user guide and tutorial to reflect Builder APIs.

issue: https://jira.kiji.org/browse/EXP-402
review: https://review.kiji.org/r/1568
commit: https://github.com/kijiproject/kijiproject.github.com/commit/97b3bb55221034efbc58e38f614e003e16d13a4c