KIJIMR-110. Improves KijiTableReducer API.

Reviewed by: aaron
KIJIMR-108. Hides forName methods from SPIs.

Reviewed by: lsheng
KIJIMR-157. KijiJobHistory prints a list of all jobs.

* Removes --install option from KijiJobHistory.
* Adds an integration test to IntegrationTestJobHistoryKijiTable for job-history tool.

reviewer: milo
review: https://review.kiji.org/r/74/
Add release notes to tarball artifact.