Version 0.7.8, 2002-02-28
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* More capabilities for Pipe, inspired by SysV STREAMS, including peeking,
    better buffering, and stack ops. NOT BACKWARDS COMPATIBLE: SEE DOCUMENTATION
* Added a BufferingFilter class
* Added popen() based EntropySource for generic Unix systems (unix_rnd)
* Moved 'devrand' module into main distribution (ent_file.h), renamed to
    File_EntropySource, and changed interface somewhat.
* Made Randpool somewhat more conservative and also 25% faster
* Minor fixes and updates for the configure script
* Added some tweaks for memory allocation
* Documentation updates for the new Pipe interface
* Fixed various minor bugs
* Added a couple of new example programs (stack and hasher2)