* Solve bug related to corrupted texture tiles for certain sizes.
* Regard layer settings when sampling height map.
* Make Tile in to a class instead of a struct.
* Memory aware lru cache. Needs cleanup.
* Clean up and comment.
* Clean up and comment.
* Clean up
* Clean up and comment.
* Fix compilation error on Windows.
* Specify data type explicitly in GDAL xml config files for Utah height maps. Closes#242
* Update the key type for the memory aware lru cache and use a unordered map instead of a map.
* Solve pixel row size bug.
* Solve initialization bug.
* Add cache size as property of the globe browsing module.
* Use memory aware tile cache for text tile provider.
* Log GDAL errors as GHOUL messages
* Add the ability to toggle tile level limiting by available data
* Add ability to toggle GDAL logging
* Add lock guard to memory aware tile cache
* create base class rawtiledatareader that can be extended with different implementations than GDAL.
* Let GdalWrapper take care of global GDAL settings.
* Move iodescription to separate file
* Move some functionality from gdalrawtiledatareader to rawtiledatareader
* Move functionality from gdalrawtiledatareader to rawtiledatareader.
* GDAL is no longer a necessary dependency for the globebrowsing module. However to read tiles, the SimpleRawTileDataReader needs to be implemented. Otherwise GDAL is needed.
* Add ifdef check for GLOBEBROWSING_USE_GDAL
* Implement SimpleRawTileDataReader. Currently can only read pow 2 textures.
* Change ints to unsigned long longs
* Limit number of texture creations per tile provider per frame
* Solve linker error on windows
* Fix Windows build errors
* Fix crash in reading local patches
* Update lodglobe descriptions
* Abstract away overviews in gdal raw tile data reader
* Update Mars and Moon configs.
* Update screenshot script
* Update ghoul version
* Remove use of interaction depth below ellipsoid
* Normalize direction vector
* Use scale for distance swotch
* Go back to use of interaction depth below ellipsoid
* Fix comments on pull request.
* TileProviderByLevel error does not propagate up.
* Comment on mars and moon mod file
* Add model space cut off level as a property
* Update ChunkTile struct
* Minor clean up
* Go back tu constructor for ChunkTile
