- 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)
- fixed example testing script
- Added finer axis ticks back in some instances
- fixed improper bounds caching in log/fft mode
- fixed exception handling in remoteproxy