optional arguments to the worker function.

 - Simplified and optimized the running_stats implementation
 - Clarified the spec a little

from compiling.

Turns out this causes path conflicts on some systems.

in visual studio.

of an image_window.

image_window widgets.

one makes it easy to get just a list of full_object_detections
as output.

information into full_object_detections.

widget.

widgets virtual.

a map of strings to points to represent object parts.  This
change also removes the old head point from a box since this
information can now be represented in the parts map.

outside the dlib namespace.

can count real valued loss values correctly.

to easily get a transformation matrix of a particular size.