add storage spec
add mock_redis dev dependency
require mock redis in spec helper
failing Storage initialize spec
add storage class and #new
Storage#save spec
set redis value and check return value
spec on storage#get command
add storage#get and storage#retrieve methods
spec for storage get all features list
add retrieve all, and keys methods
refactor storage#persist method
method typo
feature#serialized spec
feature serialized implementation
refactor #serialized to to_s
return features as symbols
spec for building feature from string
parse feature#to_s back into feature
featurerelease #save spec