TODO: before release 1.0

+ Precompute grids

+ Pack all data files in a data set

+ Use xml dataset description ( with source, copyright...) 

+ Improve error metric for better lod switch

+ Add Camere and a Trackball classes 

+ create autoconf scripts ( that works with cross compilers!) 

+ Add vectorial infos ( politicial boundaries, cities, points of interest, vegetation, climate...) 

+ Add dynamic bump map
