MATH-1151
New interface "ValueAndJacobianFunction" (to allow separate evaluation
of either quantity) is a precondition for lazy evaluation (and is enforced
by raising an exception early rather than wait for a failed cast).


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1625967 13f79535-47bb-0310-9956-ffa450edef68