* Fixed a scons issue, where libraries checked for C instead of C++ * Fixed a shutdown order problem - deleting a GLImage will reference the RenderBackend, thus image pools must be deleted first. * Added an explicit Engine.destroy method to force the shutdown, in case python fails to do so. Necessary - see above. * The Pool::printStatistics now gives out information how many resources are loaded. Called before destruction. Add 'pool' to the LogModules to check memory pooling issues.