V1.1.15: Replace SVGAndroid with AndroidSVG library.

Add importSVGPath and exportSVGPath.
Add margin parameter for zoomToExtent and zoomToModel.
Add getUnlockedShapeCount and eraseView.
Add IViewHelper.createDummyView.
Add OnDrawGestureListener.
Store change count for redo/undo.
Enable force to set line cap.

V1.1.14: Add createSurfaceAndImageView, showMessage and gesture velocity.

v1.1.14

Update README.