* Split RenderableSphere class into a local and an online sphere
* Make the video sphere derive from the regular sphere
* Make RenderableTimeVaryingSphere derive from RenderableSphere
* Some clean up
* Add general functions for renderable matrix calculations
* Make RenderableSphere and Plane use them
* Fix an issue with the RenderablePlane shader
* Make one function that returns all three types of render matrices
* Make more Renderables use the general matric calculation function
* Make more Renderable use the general matrix function
* Simplify alternative transforms for matrix calculations
* Small clean-up
* Update RenderableModel (again) to use new transform functions
* Make calc all matrix function to return tuple
* Update some more places
* Remove planet geometry and simplespheregeometry
* Only use a single TLE loading implementation
* Add caching to the satellite loader; Add Lua function to load kepler file
* Fix RenderablePlanetProjection specification
* Add OMM loading funtion; Remove mean motion from Kepler parameters
* Replace TLETranslation class with GPTranslation and support OMM files
* Support loading SMDB files in kepler functions
* Merge RenderableSatellites and RenderableSmallBody with RenderableOrbitalKepler
* Update submodules
* Adapt existing satellites to new OMM file type
* Remove TLE helper
* Remove SSSB shared file and adapt sssb assets
* Add ability to render the bounding sphere as a debug option
* Separate boundingsphere and interactionspheres
* Correctly compute BoundingSpheres for more renderables (RenderablePlanesCloud, RenderableOrbitalKepler)
* Fixed renderablesmallbody selective rendering props to accept asset file settings
* Set to only show selective rendering log info msg if render size is 1
* Mirrored selective rendering behavior from smallbody to satellites
* Added property coupling of values to satellite/asteroid render settings for size, start index, upperlimit
* Fix for selective rendering with synced render settings
* Removed redundant property definitions for codegen compliance
* Improvements to documentation and handling values spec'd in asset file
* Fix for satellites: selective rendering settings specified from assets
* Adapting to introduction of new Dictionary class in Ghoul
* Mainly replacing usage of float instead of doubles as expected
* Adjust to the lack of the hasKeyAndValue function
* Cleaner handling of global state
* Prevent Lua memory corruption (closes#982)
* Initialize glfw first thing to prevent weird joystick loading bug during startup
