SCHEMA-475. Packaging for profiled schema/MR.

In order to generate profiling data from kiji, users can call the
enable-profiling script before and disable-profiling script after
their kiji commands.
SCHEMA-396. KijiTable readers and writers handle table layout updates

issue: https://jira.kiji.org/browse/SCHEMA-396
review: https://review.kiji.org/r/787