kiji-modeling: EXP-404. Update express version to 1.0.0-SNAPSHOT.

issue: https://jira.kiji.org/browse/EXP-404
review: https://review.kiji.org/r/1577
commit: https://github.com/kijiproject/kiji-modeling/commit/68c247738c455c052cc2666724b28f6a66bcf319
kiji-express: EXP-405. Update ApiAudience from Experimental to stable for 1.0 release.

issue: https://jira.kiji.org/browse/EXP-405
review: https://review.kiji.org/r/1578
commit: https://github.com/kijiproject/kiji-express/commit/aea44e2bbb9540d495483f08dfca5e7683b61da5