* Now solver interalg can handle all types of constraints and integration problems
* Some minor improvements and code cleanup
* Interval analysis now can involve min, max and 1-d monotone splines R -> R of 1st and 3rd order
* Some bugfixes and improvements
* Some minor changes
* Some improvements for obtaining derivatives in points from R^n where left or right derivative for a variable is absent, especially for stencil > 1
See http://openopt.org for more details.