Updating the meta key documentation to warn users that { root: false } will cause the serializer to ignore the meta key as it leads to invalid JSON.

https://github.com/rails-api/active_model_serializers/issues/332
add an example for how to test serializers easily

off topic: please deactivate the WIKI if there is no content in it
add MiniTest and RSpec examples
add Design and Implementation section to readme

credit to @garysweaver
Merge pull request #382 from mikegee/360-design-and-implementation-wrapped

Addition of Design and Implementation section to Readme (wrapped)
Remove everything, rewrite of AMS starts here
Serialize just attributes
Implement Serializer's root
Implement Serializer's scope
Tests refactor
Implement SerializerSupport class
Implement AC integration
Move models and serializers in test to fixtures.rb file
Add AMS support to AR objects
Implement meta and meta_key for AM::Serializer
Re-order properties
Remove method redefined warning
Fix directories the project is on top level dir
Remove SerializerSupport
Implement has_one's and serialize_ids