Keeping only two Ruby versions
Actions::AppendWith now returns Text
Atom#to_json now returns Items::JSON instance
Removing deprecated JSON#[] method
Items::JSON should behave like a String, not Hash
Allowing Hash as an argument for Items::JSON
JSON#find_all may only return JSON or Text
Runtime#to_json now relies on Item#serialize method
Updated set of tests for Actions::AppendWith
Updated set of tests for Actions::ConvertToHTML
Updated set of test for Actions::ConvertToJSON
Updated set of tests for Actions::ConvertToMarkdown
Updated set of tests for Actions::ConvertToTime
Updated set of tests for Actions::ConvertToXML
Updated set of tests for Actions::CreateAtom
New test set for Actions::Fetch
New test set for Actions::FindFirst
New test set for Actions::Find
Updated set of tests for Actions::PrependWith