- Support of Event Queue in Task Class
- Support of time duration of sleep
- Make CurrentTcb private member of TaskScheduler class
- Support of display resolution change
- Build process improvement(build floppy image)
- Create dependecy file automatically
- Support of shell 
- Support of floppy disk access
- Support of FAT12

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Following todo item is done.

ver.016
 - Create "idle task"
 - Singleton pattern is applied to some global objects.
 - [BugFix]Don't move Idle Task, if use setPriority method.

ver.015
 - Support of task slice time
 - TaskSwitcher definition move to task.cc
 - Support of sleep(Wait/SendEvt)

ver.014
 - Support of task priority

