Merge of early results code for SC 13 paper.

This code enables the early results work
from the SIDR paper.

Test cases were patched to support our
extended version of write() that includes
how many records were combined for the
current k/v pair.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Fix HADOOP-8329

Apply a patch for HADOOP-8329 which has to do
with compiling this code with Java 7.

Signed-off-by: Joe Buck <jbbuck@gmail.com>