Change in plans
        - The C pretty-printer fails under normal circumstances:
        int main(){
            printf("hello world.\n");
            int a;
            int *ap;
            a = 5;
            ap = &a;
            return 0;
        }
        - New plan: Elaborate the MicroC interpreter into a
            pretty printer.
        - Phase 1: MicroC interpreter added
        - Phase 2: Pretty print strings (the -a switch)
        - Phase 3: Added window classes