Revert "ripping out SORT_VALUES (Issue #240) for now, since I can't make it work on Hadoop"

This reverts commit 1e304c5419ad64b8dcfd10cf2ace4c8dcbfd6094.

Conflicts:
	mrjob/job.py
	mrjob/runner.py
first stab at using the Hadoop O'Reilly book to get secondary sort working

mr_next_word_stats.py works in inline mode, but can't even read in lines
on EMR