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 'upstream'
Add /usr/share/man to the installation manifest.

Include the new man page for `spl` in its package.
PPA 0.6.0.101-0ubuntu1 release.