Create splat man page

The automake templates have been updated to install this man
page and the existing packaging was updated to include it.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Merge branch 'spl-master' into spl-prune

Conflicts:
	Makefile.am
	configure.ac
	rpm/generic/spl.spec.in