0.11.0

• DrawingOperationStack.clearRedoStack() clears all redo operations from the
  redo stack.
• DrawingToolForShapeWithThreePoints and
  DrawingToolForShapeWithTwoPoints are declared open instead of public so
  they can be subclassed.
• PenShape now works with the selection tool.
• DrawsanaView.selectionIndicatorAnchorPointOffset allows Drawsana to
  keep working when you change the anchorPoint.
• Shape.id is now settable.
• Fix bug that prevented character input of some languages, including Chinese.
• Fix bugs in gesture recognizer.