installed on windows via pip.

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

to avoid dll hell.

in its output.  This way they will get included by the python setup.py script.

it works with the currently selected compiler and only uses it if the version
is appropraite.

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