R33: Fix MgCmdManagerImpl::getCmdSubject() to avoid single instance problem.
Add shapeClicked callback function.
Return bool value for drawHandle() and drawBitmap() of GiCanvas.
Add release(), addRef() and findShapeByTag() to MgCoreView class.
Add tag parameter to addImageShape().
Add setZoomEnabled() to GiCoreView.
Simplify drawing logic for polyline and polygon shape.
Update pod spec.