* Buffer
* ShaderProgram
* VertexArrayObject

* uses GeometryDataControlFileFactory for loading
* should replace ArrayBufferControlFileATB

* remove debug outputs

* implement a more versatile PNM loading routine

Example:
SharedLocationMappings globalLocationMappings = SharedLocationMappings( new LocationMappings );
// now the map could get set by hand, but thats not needed:
ShaderProgramFileManager::the()->get( ShaderProgramControlFiles("shader1").
                                      externAttributeLocations(globalLocationMappings) );
// will add all maps from the shader1 to the global map
ShaderProgramFileManager::the()->get( ShaderProgramControlFiles("shader2").
                                      externAttributeLocations(globalLocationMappings) );
// will add all maps from shader2, attributes already known will not get changed, no location collitions.

Reloading of the shaders due to changed files will automatically set the locations again.

OpenGL/Objects now only contains wrappers of OpenGL objects, all higher-level objects are moved to OpenGL/HiLevelObjects. Also moved LocationMappings to OpenGL/Data.
OpenGL/Objects.hh still includes the high-level stuff. In the hi-level collection multiple alternative concepts can be collected to achieve similar functionality (Uniform objects instead of UniformBuffers for example) which is fine but should not lead to confusion that just the OpenGL objects in Objects/ are the main building blocks on which the HiLevelObjects/ rely on.