SCHEMA-145. Improves consistency of filter contexts.

Signed-off-by: Aaron Kimball <aaron@wibidata.com>
SCHEMA-136. KijiRowKeySplitter is now an factory-instantiable class.

Signed-off-by: Aaron Kimball <aaron@wibidata.com>
SCHEMA-130. Use generics in CellDecoderFactories.

Signed-off-by: Aaron Kimball <aaron@wibidata.com>