Updates to ad_jonas_rauch.jl:

* Modulize
* Remove ADForwardBase, change to Real
  (Is ADForwardBase useful?)
* Update tests
* Rename grad, Gradient -> gradient
Rename real -> value, remove extraneous functions

* the extra functions were ones that I added in an incarnation
  as dual numbers, and which don't make much sense
Merge pull request #3 from scidom/kms/rework_jonas

Updates to ad_jonas_rauch.jl: