kiji-express-examples: EXP-280. Improve and update express examples for 1.0.0 features.

issue: https://jira.kiji.org/browse/EXP-280
review: https://review.kiji.org/r/1367
commit: https://github.com/kijiproject/kiji-express-examples/commit/92efdf680d06566a3833d7d92ca6962b7b821113