Merge pull request #146 from basho/jem-source-default-scripts

Require root or runner privs to run `ping` command
Escape backticks in runner usage documentation.
Adds mentions of package_name.conf and advanced.config for chkconfig.
s/{{package_name}}/$SCRIPT/
Merge pull request #148 from basho/hc-chkconfig

Cleanup usage documentation for chkconfig
Source default config files in env.sh