I join myself to Koldo to thank you,

This control seems very promising and it will be a great contribution to Upp

2 remarks:
* Eigen is used and the package is not included
* Eigen has license issues : so could you force the use of only BSD parts of Eigen, otherwise many users won't be able to use you'r Ctrl

Note for all : maybe Eigen should have 2 separate packages :
* one BSD only (Eigen_BSD)
* and another one (Eigen_GPL) with all Eigen available (just to be sure no GPL code get's in a commercial APP)
This would also enable having a valid "Copying" file

Continue good work