Add OnShapeWillDeleteListener, snapshotWithShapes, setSelectedShapeID, getViewBox and getCurrentModelPoint.
Update JNI.
Change the parameter type of onShapeAdded.
R24: Add parameters for onDocLoaded and setStepPoint.
Add vgpivot. Fix addExtension.
Add getModelBox.
Update JNI.
Add MgSelDrawFlags.
Support text angle in drawTextAt.
Support alignment enumeration for drawTextAt().
Update JNI about the kMgCanSelLocked flag.
Update JNI (about drawTextAt).
Add getVisibleShapeCount() and getPath().
R27: Add setOptionString().
Add transformWith2P().
Add registerNamedObserver.
Add parameters of shapeDblClick and shapeClicked.
R27