Collected Kiji MapReduce Javadoc improvements.
Renamed instances of KijiMapReduce to KijiMR

Signed-off-by: Daisy Zhou <daisy@wibidata.com>
Removes references to internal WibiData jira.
over-the-shoulder review: Robert

Signed-off-by: Daisy Zhou <daisy@wibidata.com>
Fix typo in README.md.
Set properties for release.
Fix XML comment issue in pom.xml.
[maven-release-plugin] prepare release kiji-mapreduce-root-1.0.0-rc4
[maven-release-plugin] prepare for next development iteration
Update properties for development.