move core_ext into the folder structure under active_remote so it is not on the global load path
add structure under active_remote/core_ext and config object
add railtie to expose config to rails config
typo in ActiveRemove!
require protobuf and add config object to ActiveRemote namespace method
add updated_at to cache_key when configured to do so and present on proto
add inclusion of root in json to config and default updated_at in cache_key
add specs for non-rooted json
add spec for defaulted updated_at appended to cache_key