POM-14. Depend on CDH4.2 (HBase 0.94) in root pom

issue: https://jira.kiji.org/browse/POM-14
review: https://review.kiji.org/r/454
[maven-release-plugin] prepare release kiji-poms-1.1.0
[maven-release-plugin] prepare for next development iteration
POM-15. Add versions-maven-plugin definition.

Adds a simple definition of a versions-maven-plugin configuration
you can run with versions:update-properties to change Kiji component
versions.

Also adds kiji-nightly to the set of repos visible to plugins.
[maven-release-plugin] prepare release kiji-poms-1.1.1
[maven-release-plugin] prepare for next development iteration
POM-16. Upgrade to CDH 4.3.0.
[maven-release-plugin] prepare release kiji-poms-1.1.2
[maven-release-plugin] prepare for next development iteration
POM-9. Upgrade to Avro 1.7.5

issue: https://jira.kiji.org/browse/POM-9
review: https://review.kiji.org/r/991
POM-21. Update guava dependency to version 14

issue: https://jira.kiji.org/browse/POM-21
review: https://review.kiji.org/r/1056
Fix for POM-21. Guava depends on JSR-305.

 - Guava's dependency on JSR-305 is "provided", so kiji-schema and others must provide it.

Reviewed over-the-shoulder by Lee Sheng.
Add cobertura to the available maven plugins in the root-pom.

Signed-off-by: amit <amit@wibidata.com>