Audit module documentation (X to Z + new mac modules)

This commit completes the work started in 7d4739d, putting CLI examples
in bash code-blocks to give them syntax highlighting on
docs.saltstack.com. Combined with 5094719, this both improves the
documentation on the website, as well as the messages seen when using
sys.doc.
Merge pull request #7258 from terminalmage/docs

Audit module documentation (X to Z + new mac modules)