Add hostname normalization to lowercase.
Add ability to have notes and notes_url entries for hosts.
Merge branch 'add_host_notes' of github.com:scottso/nagios into att-v4

Conflicts:
	README.md
	attributes/server.rb
Merge branch 'normalize_hostnames' of github.com:scottso/nagios into att-v4

Conflicts:
	README.md
	attributes/server.rb
	templates/default/hosts.cfg.erb