Dali C#: Common Interface Define related changes

- AnimateBetween() API re-define, KeyFrames class Add() API re-define.
- Size3D (high level class) newly added.
- Vector2/3/4 class's variables => Pascal case naming changed.
- FocusManger: some naming which contained "Keyborad" changed.
- ImageView: sample code newly added, "PixelArea" property and AnimateBetween() are tested.
  image view reloading tested.
- Stage: single-tone pattern Instance property newly added. GetDefaultLayer(), AddLayer(),
  and RemoveLayer() are newly added. GetRootLayer(), Add() and Remove() will be moved to 'internal' folder.
  TouchEvent, WheelEvent, KeyEvent naming changed.
- Layer: Behavior property changed to use 'LayerBehavior enum' (not use string),
  MoveAbove() and MoveBelow() will be moved to 'internal' folder.
- Application: naming changed from AUIApplication to NUIApplication.
- SWIG build break: tooltip removed by property-wrapper.rb.
- miss spelling fixed (property).
- Animation enum value naming changed. add "name-changed.i". EndAction.Stop is changed to EndActions.StopFinal =>
  This is because, if I use 'EndAction' then the newly added 'EndAction property' has overlapped with enum itself.
  and if I use 'Stop' then the Stop() method's name is overlapped so SWIG doesn't generate Stop() method.

Change-Id: I519eb592e8d002fefa72b5bf78f830beae3f8d20
Signed-off-by: dongsug.song <dongsug.song@samsung.com>