* renamed some enums
* include/Dialog_Partition_Copy.h, include/GParted_Core.h, include/OperationCopy.h, include/Win_GParted.h, src/Dialog_Partition_Copy.cc, src/GParted_Core.cc, src/OperationCopy.cc, src/Win_GParted.cc: made blocksize settable by the user.
* lots of cleanups in operationhandling. This resulted in cleaner/less code and the fixing of some longstanding issues.