Renamed numerical integration header to dlib/numerical_integration.h.  Changed relevant headers to include numerical_integration.h  Fixed documentation in integrate_function_adapt_simpson_abstract.h

Simpson rule.  Added unit tests and supporting examples for this
function.

Simpson rule.  Added unit tests and supporting examples for this
function.

a numerical integration method to /examples/adapt_simp.cpp

to avoid a run time error in gcc 4.7.

--HG--
rename : tools/python/src/decision_funcions.cpp => tools/python/src/decision_functions.cpp

avoids a runtime linking error bug in the MKL that happens when you make
a shared library and try to use it from python.

transform.

since it's easy to mix up the adjust threshold and epsilon arguments
and these checks will usually catch that.  The checks are also very
low cost.