- GraphicsItem.pixelVectors copies cached results before returning
- Multiprocess fixes for Windows:
- mmap/shm uses anonymous maps rather than tempfiles
- avoid use of getppid and setpgrp
- work around hmac authentication bug (use os.urandom to generate key)
- avoid sending keyboard interrupt signals to child processes
- parallelizer keeps better track of processes that die unexpectedly
- added ability to specify a different executable when starting new processes
- ForkedProcess is much more careful with inherited state -- closes file handles, removes atexit and excepthook callbacks
- Remote processes copy sys.path from parent
- Parallelizer has ProgressDialog support
- Many docstring updates
- Added some test code for remote GraphicsView rendering
