Added carets for regex

Added carets for regex, and state declarations for clarity. The role didn't work for me without adding the carets.
Merge pull request #1 from waltermj/master

Added carets for regex. Awesome, looks good to me!
Make many hard coded values overridable

* Add the ability to specify object dir is a cfg_dir so we
  don't need to add config files to nagios.cfg explicitly
* Simplified the main task file down to two tasks that process
  multiple files