[COOK-4031] - Added attributes for nagios data bags.
Added attributes and updated nrpe.cfg and cgi.cfg templates for more tunable configurations.
Updated nagios.cfg and cgi.cfg templates for more tunable configurations.
Fixed type for unmanagedhosts data bag attribute
Updated README with new attributes
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
Merge pull request #217 from cstewart87/master

[COOK-4031] - Added attributes for nagios data bags.