* refactor: remove a few uses of native_mate/gfx_converter.h
* refactor: deprecate mate::EventEmitter
* refactor: add gin_helper::EventEmitter
* refactor: convert a few classes to use gin_helper::EventEmitter
* refactor: get rid of native_mate_converters/gfx_converter.h
* fix: follow native_mate on reporting errors
* fix: gin is weak at guessing parameter types
* fix: incorrect full class name
* fix: gin::Handle does not accept null
* refactor: use gin converters in api::Protocol
* refactor: convert JS constructor impl to gin
* refactor: use InitWithArgs helper
* fix: gin_helper::Dictionary should behave the same with mate
* fix cpplint warnings
* refactor: no more need to patch gin/dictionary.h
* move Destroyable utilities out of native_mate
* do not set "destroy" in ObjectTemplateBuilder
* remove ObjectTemplateBuilder::MakeDestroyable
* do not pollute gin namespace
* add more comments
* remove hack of Arguments
