Added all CIS Section 8 Level 1 & 2 tasks & various fixes

https://benchmarks.cisecurity.org/tools2/ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.0.0.pdf
admin and sudo are both security groups that indicate someone is a root capable privilege user.  I think admin might be a legacy of 11.10 and earlier when I don't recall sudo existing as a group by default.  We don't have a defined "admin" group so I thought admin worked well enough.