This fixes below bugs:
* addReply() had used native compare operator for string ids
=> descendants may appears at wrong position
* CONTEXT_FETCH_SUCCESS had added the focused status as the reply of the *first* status in ancestors, not last status.
=> descendants may also appears wrong position as well as correct position
* TIMELINE_UPDATE had added the status to replies of *itself* instead of replied status
=> browser will hangs if you open the status due to a circular reference
* Added a timeline for Direct statuses
* Lists all Direct statuses you've sent and received
* Displayed in Getting Started
* Streaming server support for direct TL
* Changes to match other timelines in 2.0
Filtering the status collection wipes out even the profiles of muted and
blocked accounts. However, the behavior is inconsistent with the server-
side behavior.
* Move ancestors/descendants out of timelines reducer
* Refactor timelines reducer
All types of timelines now have a flat structure and use the same
reducer functions and actions
* Reintroduce some missing behaviours
* Fix wrong import in reports
* Fix includes typo
* Fix issue related to "next" pagination in timelines and notifications
* Fix bug with timeline's initial state, expandNotifications
