A SIMPLE KEY FOR ROCHUS-KELLER UNVEILED

An Investigation with Valgrind disclosed that the most costly capabilities are mutex locking/unlocking, malloc/free 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 running time of 142