- Support of floppy disk access
- Support of FAT12
- Support of shell app
- Build process improvement(build floppy image)
- Make CurrentTcb private member of TaskScheduler class
- Support of time duration of sleep
- Support of display resolution change

---------------------------------------------
Following todo item is done.

ver.017
 - Support of interval timer
 - Task Class should have Event Queue
 - Create dependecy file automatically
 - Support of cursor move
 - Key event handling improvement
 - Support of String class
 - Support of shell task (pseudo command "mem" support)

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

