New features:
- Add transparency to node handles
- Add more contrast to the 'add' handle
- Add timeouts to node handles
- Don't show handles while dragging
- Fix GitHub Issue #7: Setting for text color
- Make node handles a bit smaller
- Take width into account when drawing edges
Bug Fixes:
- Fix GitHub Issue #30: Node handles are missing anti-aliasing and appear ugly
Other:
- Disable debug logging also if QT_NO_DEBUG defined
- Switch to SimpleLogger
- Update examples