* Cleanup
* CMake cleanups
* Update current year
* Update copyright header
* Use script to return list of all modules
* Update credits, license and ghoul
* Add Adam Aslegård's module that renders Gaia mission stars
* Add module for Gaia mission
* Add CCfits and cfitsio submodules and the implemented fitsfilereader module from the OpenSpace-sun-earth-event branch
* Add a TaskRunner to read from a fits file
* Adding ability to render other data values from Star speck files
* Add new method to OptionProperty to take vector of options
* Make it possible to change the speck file at runtime
* Include viridis color lut
* Add Apogee and Galah datasets
* Make it possible to filter stars by other data values
* Add ability to statically filter data values
* Removal of ChunkRenderer, ChunkedLodGlobe, ChunkCuller, chunklevel evaluator, culling classes, layershadermanager, GpuLayer, GPUData, ChunkNode, Grid, BasicGrid, Chunk files, Angle, AABB classes, PointGlobe, Ellipsoid, TileSelector, tiledatatype, iodescription, simplerawtilerreader, rawtilereader
* Less dynamic allocation for SkirtedGrid, LayerManager, RenderableGlobe, TextureUnit
* Clean up memory management in RawTiles
* Code simplification
* Optimize shader uniform setting
* Introduce UniformCache
* Callback simplification
* Turn ChunkNode into a struct
* Use a MemoryPool to organize all ChunkNodes rather than use unique_ptr and the necessary memory allocation
* Collect draw calls
* Consolidate fragment shaders between local and global renderer
* Shader cleanup and optimization
* Update CMake to not include included shaders
* Integrate traversal function into the looping
* Replace std::queue with std::vector
* Merge TextureContainer into MemoryAwareTileCache
* Lazy computation of chunk bounding boxes
* Memory management of LayerGroup
* Remove class hierarchy from tileproviders (temporaltileprovider not working yet)
* Remove PBO classes
* Chunk status stored in Chunk
* Don't create a copy of the ChunkTilePile
* Enable culling by projected area on default
* Have raw tile reader return a Tile instead of a shared_ptr to a tile
* Start making GDAL mandatory
* Increase the default lod scale factor to 15
