Update essentials_cookbooks.rst

added missing words.
Merge pull request #142 from chriscabral/master

Update essentials_cookbooks.rst
cache_* is deprecated, so encourage people to use the correct syntax for the syntax_check_cache path.

Don't do unnecessary string interpolation for the AWS and Rackspace keys.
add install topics to /enterprise

these are based on the existing Private Chef topics
Merge pull request #143 from juliandunn/knife-rb-config-cleanup

knife.rb config cleanups
fix
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remove .doctrees folder
updates
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add example for file specificity
updates for file specificity
change name to private-chef-ctl in link
add list of services
add admin/upgrade scenarios
update knife[:editor] for Windows path issues
edit
edit
edit
edit