* Make height map fallback layer work again
* Add documentation to joystick button bindings
* Removed grouped property headers
* Add new version number constant generated by CMake
* Make Joystick deadzone work properly
* Change the startup date on Earth to today
* Fix key modifier handling
* Add debugging indices for TreeNodeDebugging
* Fix script schedule for OsirisRex
* Do not open Mission schedule automatically
* Upload default projection texture automatically
* General code cleanup
* Fix check_style_guide warnings
* Remove .clang-format
* MacOS compile fixes
* Clang analyzer fixes
* Create volume generation task
* Change domain bounds into a non-optional parameter
* Work on volume generation and rendering
* Example generation of time varying volume
* Example generation of time varying volume
* Compile fix in RenderableKameleonVolume
* Fix copy and paste error
* Enable spherical raycasting again
* Uniform naming
* Add some documentation and remove dead code
* Introduced guiName to PropertyOwner
* Added requirement that PropertyOwner::identifier may not contain whitespaces
* Changed Name to Identifier in asset and scene files
* Added new PropertyOwner to RenderEngine that owns the ScreenSpaceRenderables
* Moved Name and GuiPath into GUI group
* Added user-facing names to layer groups
* Add implementation of pure URL synchronization from foreign sources
* Added hash of concatenated URLs to the identifier
* Make the identifier optional
* Remove unused code
* Adding ScreenSpaceSpout object to display spout textures in screen space
* Enable the clearing of option properties
* Fix crash in ScreenSpaceImageLocal specification
* Split RenderablePlane into RenderablePlaneImageLocal and RenderablePlaneImageOnline
* Add RenderablePlane Spout
* Rename Texture parameter in ScreenSpaceImageOnline into URL
Closes#518
