KIJIMR-180. Removes deprecated getEntityId() from ProducerContext.

Reviewer: Aaron Kimball
https://review.kiji.org/r/291/
https://jira.kiji.org/browse/KIJIMR-180
Editorial pass on release notes.
Update version properties before release.
[maven-release-plugin] prepare release kiji-mapreduce-root-1.0.0-rc61
Adds patches for Opower fork of Kiji Mapreduce
Upgrades to latest Opower Kiji Schema
Internal release of kiji-mapreduce 1.0.0-rc6 with https://review.kiji.org/r/37/ and https://github.com/kijiproject/kiji-mapreduce/pull/80
Add README with list of differences with master repo.
Initial thoughts, unclear of compilation.
Initial thoughts, unclear of compilation.
Passing tests.
Merge branch 'hash_aware_input_format' of github.com:essandem/kiji-mapreduce into hash_aware_input_format

Conflicts:
	build-resources/pom.xml
	kiji-mapreduce/pom.xml
	pom.xml