[MODIFY] no more using slug
[MODIFY] reduce embedded list data
[MODIFY] important parameter is id_str rather than uri
[MODIFY] use id_str on retrieving user-stream
[MODIFY] check friends_str on user-stream because it sent stringify_friend_id
[FIX] duplicate following user
[MODIFY] unfollow check enhance on user-stream
[MODIFY] update streaming status by Object.observe
[MODIFY] remove unnecessary code
Revert "[MODIFY] change webworker usage"
Revert "[MODIFY] use WebWorker for purgeBlockedUsers"

This reverts commit 31146cd9bc185b7fb7dfd297be2bf56028d73c32.
This reverts commit bf616d7d986ad0dd6a4571e11ac15988d022a41d.
[MODIFY] use Set to store blocked and muted users in tweetmanager
[MODIFY] it uses id to check following
[MODIFY] use Set for unreadTweets on tweetmanager
[MODIFY] use Map for retweets on tweetmanager
[MODIFY] notifications makes to be simple and static
[MODIFY] remove unworking parameters
[MODIFY] unnecessary class method on tweetmanager moves to local
[MODIFY] add observer for listsCache on tweetmanager
[MODIFY] remove unnecessary code
[MODIFY] use Array Iterator for renderer