added three undocumented APIs GET activity/about_me.json, GET activity/by_friends.json and GET statuses/:id/activity/summary.json
added method for undocumented API GET conversation/show.json
added method for undocumented API GET discover/highlight.json
added method for undocumented API GET discover/universal.json
added methods for undocumented APIs GET statuses/media_timeline.json, GET users/recommendations.json and GET timeline/home.json
formatting