Update the cookbook readme to reflect the current cookbook

Remove a few sections that weren't valid, reaorder the attributes, fix
wording, capitalize many many things, stop referring to Nagios client
when it should be NRPE.
Further cleanup of the formatting to better display on Github
Catch the scenario where the users data bag doesn't exist
Remove uneeded users databag search in the apache recipe

This isn't used anywhere in this recipe and the same search is done in
the server recipe where it belongs
Add an additional alias for the stylesheets so the page renders correct at /
Use attributes to for the plugins directory in commands.cfg

Also reformat all commands to be same same
Merge pull request #92 from tas50/COOK-2216

Cook 2216: Readme cleanup to remove invalid content and reformat for better display
Merge pull request #93 from tas50/COOK-2240

COOK-2240: Catch the scenario where the users data bag doesn't exist
Merge pull request #94 from tas50/COOK-2241

COOK-2241: Add an additional alias for the stylesheets so the page renders correctly
Merge pull request #95 from tas50/COOK-2242

COOK-2242: Remove non-functional and commented out sections from NRPE and services ERBs
Merge pull request #99 from tas50/COOK-2246

COOK-2246: Use attributes to for the plugins directory in commands.cfg