KIJIMR-263. KijiTableKeyValueStore.TableKVReader should use a pool of readers for threadsafety

issue: https://jira.kiji.org/browse/KIJIMR-263
review: https://review.kiji.org/r/1658
KIJIMR-262. Tool to rewrite cells in a Kiji table

 - Pivot M/R job that rewrites cells in a column of a Kiji table.
 - Rewriting rules are specified through an Avro record serialized in the Hadoop configuration.
 - Rewriting rules are chained to allow the decomposition of incompatible changes in a sequence compatible changes.
 - Unit-tests.

issue: https://jira.kiji.org/browse/KIJIMR-262
review: https://review.kiji.org/r/1618
[maven-release-plugin] prepare release kiji-mapreduce-root-1.2.5
[maven-release-plugin] prepare for next development iteration
EXP-420. Update to scala 2.10

issue: https://jira.kiji.org/browse/EXP-420
review: https://review.kiji.org/r/1698
SCHEMA-648. Compatibility change for new schema bridge API.

Reviewed-by: Daisy
Update to use the latest SNAPSHOT version of kiji-schema
SCHEMA-675. Update KijiMapReduce to use new KijiColumnNameTranslator api
Update versions for release
KIJIMR-268. Updates stability annotations.

Signed-off-by: Lee Sheng <lsheng@wibidata.com>
Update to release version of platform
[maven-release-plugin] prepare release kiji-mapreduce-root-1.2.6
[maven-release-plugin] prepare for next development iteration
KIJIMR-270.  Update schema.impl refs (SCHEMA-693).

review: https://review.kiji.org/r/1781
issue: https://jira.kiji.org/KIJIMR-270
KIJIMR-271.  Update schema dependency to 1.4.1.

Needed for refactoring of schema.impl to schema.impl.hbase in
SCHEMA-693.

review: https://review.kiji.org/r/1784
issue: https://jira.kiji.org/KIJIMR-271
SCHEMA-684. Replace HBase's MiniZKCluster with Curator's TestingCluster

issue: https://jira.kiji.org/browse/SCHEMA-684
review: https://review.kiji.org/r/1794
POM-32. Add references to Curator in root-pom.

issue: https://jira.kiji.org/browse/POM-32
review: https://review.kiji.org/r/1799