feat(install): step by step checks with useful error messages
Merge branch 'master' of git://github.com/FEELDEAD/chef-repo into FEELDEAD-master

Conflict resolved:
	deploy_chef_server.sh
Merge branch 'FEELDEAD-master'
cc: typo
cc: Chef nodes need unique names. Not specifying a name uses the instance ID (which is unique per instance) automatically