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
* Cleaner handling of global state
* Prevent Lua memory corruption (closes#982)
* Initialize glfw first thing to prevent weird joystick loading bug during startup
* Take screnshots using lua function, returning screenshot number. Add screenshot endpoint.
* Change capitalization from screenShot to screenshot
* Fix screenshot filename collision bug when using multiple windows.
* 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.
* Added separate directory for session recording files
* Changed recording & playback paths to use RECORDINGS dir and prevent absolute or relative paths in filename.
* Updated .gitignore so that recordings directory is ignored.
* Added session recording topic for synchronization of rec/play state with web gui.
* Added support to sessionRecording for providing a list of available playback files to web GUI.
* Fixed problem with playback filenames in list
* Fixed problem with occasional large jump in camera pos/rotation after playback finishes.
* Fixed the remaining post-playback problem that was causing a jump in position and rotation.
* Fix path issue on mac
* Fixed bug with bad scale values in recordings saved in ascii format.
