qa assorted - new .out files after recent sample pmda changes

In particular, more/new help text and pmStore() now OK for
sample.colour.
Merge branch 'dev' of git://git.pcp.io/kenj/pcp into dev
python3: several module updates and pmiostat running

Now that we have installable py3 packages, its much easier
to see the wood for the trees in terms of what is still to
be done.  This commit gets pmiostat up and stumbling using
python3.

Strings proved a real problem - having to find good spots
to do any unicode/byte string conversions, since at PMAPI
level we're all the latter, but in python3 high-level land
its all the former.  A few more lingering long/int issues
also uncovered, no doubt others will crop up as more tools
are ported forward.