Prior to this commit the module did not provide a way to set a bind address for the HTTP port. This
commit allows users to not only bind to an address and port other than localhost and 8080, but it also
opens the firewall if explicitly requested.
This commit does the following:
* Use the new inifile module to manage puppet.conf
* More comprehensive management of config files
* Validate database connectivity before applying puppetdb
config changes
* Validate puppetdb connectivity before applying puppet
master config changes
* Documentation