Merge pull request #2 from shawnsi/master

Finishing CIS Benchmark
Updating gitignore
Convert to roles
Ignore sysctl missing key errors
Enable ssh pipelining
Fix cups error
Check for rhnsd before disabling it
Check to see if cups is installed
Check for avahi-daemon before disabling
Install/enable ntpd if not installed already
Only disable NFS scripts when it's installed
Ignore key errors with sysctl
Update readme
Add tags to sections
More readme changes
Allow lineinfile to create /etc/modprobe.d/CIS.conf
Adjust ntp install task
Clarify the configure_aide variable
Clarify rsyslog/auditd variables
Only run prelink if it's installed