Settings Task

This is mainly a fix release containing lots of improvements and small fixes.

• Settings task: In Voyager story, a new task "settings" provides access to scene and model parameters. Click the settings task button, then select a node in the scene tree to see and adjust its parameters.
• Wireframe now rendered in consistent color
• The size of the pins of the measurement tape scales with the scene size.
• The LOD algorithm now takes the device's maximum texture resolution into account when deciding which derivative to load.
• The way light source transforms are applied changes in this release. Documents created in previous versions need to adjust the position and orientation of their light sources.