Added all items from CIS Section 5 Levels 1 & 2

https://benchmarks.cisecurity.org/tools2/ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.0.0.pdf
They mention using `apt-get purge nis` in the doc - should we be setting `purge=yes` option here (and in the other places we're uninstalling packages)?

> purge (default: `no`): Will force purging of configuration files if the module state is set to absent.