Update README.md

Fix incorrect data bag layout.
first pass artifact_package
Make caching work

Don't delete the downloaded package, and include a SHA of the location
string in the downloaded file name.
Make it so the cache file can be used by yum
readme updated
s/create/install/ because Kyle is super picky
Merge pull request #84 from RiotGames/artifact_package

artifact_package resource
Use basic auth when anonymous access is disabled on the nexus server
Ask the nexus server if anonymous access is possible, rather than relying on a manually configured attribute
Make error message less verbose
Docs for #anonymous_enabled?
Merge commit 'ee3f36ff0aab48ff6f83c9d752a596ca7081c94a'
Merge commit '09830d87c993c5a16ffefc54ecafa12a4eada3a2'