[R-sig-dyn-mod] deSolve solution status updates

Hello!

I use deSolve in a context of a shiny interactive application. It would 
de nice to have some kind of "interactive=TRUE" switch to make solver 
functions periodically print information about current status of the 
solution. This way it would be possible to estimate time needed to solve 
the problem and present it to user.

Best Regards,
S.V.Matsievskiy