(type) Fixed bug which arbitrarily limited which chains iniface and outiface parameters are set in rules, they are allowed in all chains
Docs: Reference info added to firewall

Added reference information to the firewall module readme.
Docs: Reference information added to firewall module readme

I have added reference information to the firewall module readme. I also fixed errors introduced during squashing in my last commit.
Docs: code formatting edits on readme

Responding to comments from earlier PR to change formatting for some snippets of puppet code.
Merge pull request #397 from jbondpdx/firewall-readme

Firewall readme
Added support for statistic module
Added unit tests
Update docs, remove feature, and rename property
Merge pull request #400 from hunner/feature/statistic_module_support

Feature/statistic module support
Bugfix stat_prob -> stat_probability

I also aligned arrows and sorted the resource map
Merge pull request #402 from hunner/bugfix_statprob

Bugfix stat_prob -> stat_probability
Support netfilter-persistent for later versions

iptables-persistent 1.0 and later is now a plugin module for
netfilter-persistent and does not have its own init script or
service file.  Instead, the save action must be run on the
netfilter-persistent service.
Merge pull request #403 from rra/bug/iptables-persistent

Support netfilter-persistent for later versions
Merge pull request #374 from starstable/master

Fixed bug which arbitrarily limited iniface and outiface parameters
Update the spec_helper for consistency.
Merge pull request #404 from mhaskel/spec_updates

Update the spec_helper for consistency.
Add CentOS to facter value operatingsystem test
Centos 7 won't work with operatingsystemrelease 7.0

Centos 7 operatingsystemrelease is 7.0.1406 for example so switching to operatingsystemmajrelease would allow for 7 to be used for all EL7 products
Update firewall.rb
Update redhat.pp