Saving GDAL dataset values upon initialization of dataset to avoid calling GDAL functions afterwards since it can be done concurrently. Not done for the data reading since some (not all) GDAL dataset drivers support concurrent reading. The WMS driver does not support concurrent reading, which is why we only use one worker thread per AsyncTileDataReader. Perhaps something for the future if GDAL will ensure thread saefty.
Protecting GdalRawTileDataReader with mutex lock when initializing.
Make sure read only functions in RawTileDataReader are const.
Protecting ConcurrentJobManager with mutex lock when pushing and popping to finished jobs.
* Initial commit of satellites test branch
* Modified code to work with batch TLE files from online links specified in .mod file. Does not yet auto-download the files.
* Added debug function to mod file for testing static points in orbit
* Fixed time offset bug that was corrupting satellite positions
* Minor changes for debug output and camera position.
* Changed to circle billboard for rendering satellite position
* Added satellite group name to each renderable title, and keyboard shortcuts for toggling visibility
* Added support for using ghoul luasocket lib to download latest satellite TLE files from celestrak.com
* Adding reference to updated Ghoul submodule containing luasocket changes
* Updating reference to latest Ghoul submodule in feature/satellites
* Updated reference to new ghoul version
* Updated reference to new ghoul submodule version for satellites
* Updated reference to new ghoul submodule version for satellits
* Updated versions of TLE files
* Added new Lua-accessible downloader available for scene loading
* Improved error handling for TLE files
* Updated submodule reference for ext/ghoul prior to luasocket addition
* Update SGCT reference
