Updated ping.py - Updated Documentation

I updated the documentation.  I found that the original had target_1 - example.org which generated a parse error.  I also added a couple of additional lines to the sample config and a method of checking the config prior to restarting Diamond.
Merge pull request #424 from shuffrl/patch-1

Updated ping.py - Updated Documentation
puppet agent last_run_summary.yaml collector
Merge pull request #425 from dctrwatson/puppetagent

puppet agent last_run_summary.yaml collector
Test + fix for non-real files causing exceptions in userscriptscollector
add a collector for supervisord
Merge pull request #428 from MediaMath/supervisord

add a collector for supervisord
Merge pull request #427 from bitprophet/skip-folders-in-userscripts

Test + fix for non-real files causing exceptions in userscriptscollector
Allow the handlers to auto generate their documentation, also fix a unit test issue with the puppet agent code, and fix a import issue with supervisord, and doc updates
PEP8
doc updates