Give the client credentials as a object
Hatena::Bookmark::Restful::V1#my returns User object
Hatena::Bookmark::Restful::V1#my_tag returns a array of tags
Extract common metods into ResponseObject mixin
Hatena::Bookmark::Restful::V1#entry returns Entry instance
Hatena::Bookmark::Restful::V1#{bookmark,create_bookmark} returns Bookmark instance
Remove unnecessary requires
Merge pull request #4 from aereal/response_object

Return Response Object instead of raw Hash