unrotated chip.  Also added another constructor to chip_details that takes just
a rectangle.

from OpenCV cmake scripts.

for face pose estimation.

be built without GUI support.

used.

for certain input types.

with -fPIC.

of a const type_safe_union.

JPEG support.

to download XQuartz.

are supplied by the user.

sometimes getaddrinfo() returns that which is bad.

have a bug that causes them to crash when you do this.