dtutor.org: a call to action

[Kirill]

Numerical simulations content suggestion.

Depending on time, I would like to do it at some point but just 
in case, i'll leave it here. I think people from scientific 
community would agree. I'm also for problem specific approach 
that can be deconstructed into tools rather than giving people 
tools. basically, a high school student should be able to figure 
out everything from starting an editor to getting an eps of 
gnuplot.

1. sample uses on clusters mpi or new hpx. monte-carlo 
calculation of an area of a circle.

2. numerical recipies covers a lot of common problems in science. 
it would be a nice guide on what to include. (giving reference to 
the book of course). it should also be used to show a correct 
style of programming.

3. wolfram mathematica, matlab and sage already did a good job of 
finding and documenting showcases of popular numerical 
computations.

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web interface:

it would be nice to see the same tutorial for different paradigms 
of programming -- click a button for functional or for object 
oriented and so on. figuring out paradigms was the hardest part 
for me in learning c++.