THE SINGLE BEST STRATEGY TO USE FOR ROCHUS-KELLER

An Assessment with Valgrind revealed that the most expensive functions are mutex locking/unlocking, malloc/free of charge and QImage dealing with. So I did some optimizations regarding QImage. In commit 1f976e5b5ee3cfe40921c74b97edb8d84ff39dd3 I reorganized the Smalltalk bitmap to QImage conversion which resulted in testStandardTests working time o