- Add an update callback to calculate a bounding box for every
path to ensure correct culling of paths.
- Ensure OpenVG get's initialized even if elements are subject to
culling.
- Fix stupid memory corruption bug
- Fix bounding box calculations
- Fix docs
- Fix text size
- Expose setting background color
- Expose trigger for updating elements
- Untie nodes if deleting according element
- Allow deleting canvas, text and group elements
- Allow creating groups as children of groups
