Added --pillar-root option

Complement to --file-root option added in
abc240f7ba006f35d7f5463db54ba2aefcdde106
Added warning about * default to cron docs
quick fix to the iptables docs to show that set_policy is for the default rule on a chain
updated FAQ.
updated to faq file to reword backwards compatibility
Fix race conditions and lost events that result in dropped minion returns
Add C. R. to AUTHORS file.
Merge remote branch 'upstream/develop' into develop
added a new tutorial based around bootstrap-salt
support user-defined chain in salt iptables moudle
support user-defined chain in salt iptables state module
Make sure that an iterable is available. Fixes #8556.
Document that Raven is a required dependency. Fixes #8557.
Merge remote branch 'upstream/develop' into fix_timeouts
Gracefully handle certain bad yaml conf files.

Parsing a conf file as valid yaml might still yield something other than
a dictionary, which is required. So check for that case, log an error,
and continue the same way that an invalid yaml conf file would be handled.
Fix nested event subscriptions properly
Fix syntax error
Fix syntax error
pylint
Merge pull request #8492 from rca/salt_local_pillar_root_option

Added --pillar-root option