new: implement SerializableList which allows to store Status list as file when Java heap is not enough.
fix: file size is not set correctly when loading backup timeline file.
fix: continue to generate file read error if backup timeline file has been corrupted.
mod: introduced max wait time for defferred write of timeline backup.
Now it always backup in 10 sec at the latest.
new: Add StopWatch class to keep track of elapsed time.
mod: change log level of new file size message
mod: log read() elapsed time for time line and addStatusToList
mod: change loglevel
mod: not use backup by default
mod: make UserTimelineFileManagerImpl.getTimelineFile synchronized.
new: All account shares timeline each other, so that we can reduce size of memory consumed by same twitter user timeline.
cleanup code and introduced Util.sleep method