Complete support for all floating-point classification functions
(fpclassify, signbit) and consistently apply all overloads recursively
to the scalar part of a Jet only. This is now inline with how comparison
operators work. Sanity checks of derivatives should be performed
explicitly on the dual part of a Jet due an ambiguity on reducing the
classification results of multiple values.
Provide an fdim overload (in addition to fmin and fmax) and support
quiet versions of comparison operators also applied recursively to the
scalar part of a Jet but without type promotion.
Additionally, deprecate Ceres legacy classification functions. New code
should use C++11 function names for consistency.
Finally, simplify expressions using introduced scalar classification and
comparison.
Change-Id: I397e37425760717b991eb7ae5da0892f20c5a365
Sergiu Deitsch
182cb01c57