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things really needed by makedocs.  Things needed by makerel are now in their
own check.  Also switched to unix2dos instead of unsing flip since unix2dos is
more common.

--HG--
rename : docs/testenv => docs/testenv_rel

job.  This should give better overall CPU utilization than the previous smaller
job sizes.

LAPACK.

than returning them unmodified.

from 0 to 1.

Also added the orthogonalize() function.

to get the Q matrix by reference rather than by value.

learn_platt_scaling(), that allows you to directly call the Platt scaling code
without supplying a trainer object.

which mouse button was double clicked.

image_window::get_next_double_click() was slightly off.

when set_image() is called with an image the same size as the one currently
being displayed.

or std::vector<unsigned char> were serialized.

clang and also fixed a function call ambiguity.