General CMake cleanup/overhaul
* Enable precompiled headers for all projects
* Move specifications itto separate CMakeLists files
* Add openspace-core as a subdirectory
* Move handle_modules functionality into modules/CMakeLists.txt
* Move handleapplications logic into apps/CMakeLists.txt
* Introduce openspace-module-collection interface library to simplify inclusion of modules in applications
* Turn module initialization into a two-step process to adapt to the new minimal dependency scenario
* Compile time speedup
* Remove circular dependencies between modules and core preventing multithreaded compilation on MSVC
* Build Spice multithreaded and as static library
* Remove dependency from core to module-webbrowser
* Remove unused dependency from kameleon
* Remove additional unnecessary dependencies
* Cleanup volume/kameleon/kameleonvolume modules
* Fix visibility issues. Restrict include paths
* Compile kameleon in parallel
* Other cleanup
* Only copy CEF files from one target (hard-coded to OpenSpace right now)
* Remove unused instrumentation code
* Remove the ability to render AABB for globes as it caused a circular dependency between GlobeBrowsing and Debugging
* Removing compiler and cppcheck warnings
* Turn almost all includes into non-system includes
* Don't warn on deprecrated copy
* Updated submodules
* Added functionality of saving out screenshots (with fixed FPS) from a recorded session during playback.
* Test of feature to request if all data is ready to be rendered, primary used in GlobeBrowsing. Need to go over how chunkTiles are set to OK (some are never OK..).
* Estimated having working request of checking if chunks with correct level have their color and height data loaded and ready to be rendered. Will re-enable frames saving and try making a movie.
* Created adaptive LOD factor based on available/unavailable tile data (such that we don't run a lot of iterations with asking for a pile of data that does not fit in the tile cache).
* Made it able to specify tile cache size in configurastion file. Renamed other Cache value to WMSCache, as we have the TileCache as well.
* Fix for when focus node has nor renderable, when checking for if dersired data has been loaded. Should probably check all renderable/planets anyway, not just a focus object.
* Cleanup
* CMake cleanups
* Update current year
* Update copyright header
* Use script to return list of all modules
* Update credits, license and ghoul
* 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
