0.59.0

• Fixed save/load of user plugs created via the UI (#174).
• Fixed UI for generic Options and Attributes nodes.
• Removed collapsibility of Transform node’s transform plug as it just cluttered up the UI.
• Removed collapsibility of Attribute node’s attributes plug as it just cluttered up the UI.
• Removed collapsibility of Lights node’s parameters plug as it just cluttered up the UI.
• Fixed MeshType::affects() (#175).
• Fixed SceneInspector update (#176).
• Improved SceneInspector shader representation (#147).
• Improved SceneInspector numeric formatting (#88).
• Added drag and drop node connection re-wiring (#78).
• Added virtual slider for NumericWidgets, engaged using LeftClick + Control or ShiftControl (#79).
• Fixed dirty propagation for Light nodes.
• Added first implementation of interactive rerendering in the InteractiveRenderManRender node. (#141)
• Deleting nodes attempts to rebuild the network to act as if the deleted nodes had been disabled (#95).
• Viewports can be panned/tracked using middle mouse with no modifier key (#28).