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When python does not know the encoding of stdout, sys.stdout.encoding
is None.  Then calling decode(None) raises an exception.  We just
skip decoding when the encoding is unknown.

Please use sys.stdout.encoding instead of latin-1 in setup.py.
This is necessary for non English OS.

screen.  In particular, that caused cmake's error messsages to be truncated if
the build failed.

dlib/CMakeLists.txt file is keeping the version numbers.  Also changed all
relevant scripts to grab the version information from CMakeLists.txt.

if no cmake generator is set use same logic as cmake to find default buid generator but use Win64 if the build is for 64bit Python

avoid foreign artifacts potentially left over from VM builts.

make sure --cmake can be used to pass any cmake not in the path.