print evaluation count in t_tutorial.cxx

[stevengj]

For better diagnostics.

e.g. with the default algorithm, the output is now:

found minimum at f(0.333333,0.296296) = 0.5443310497 after 48 evaluations

[jschueller]

seems AUGLAG runs forever here with these modified stopping criteria

[stevengj]

Probably the local_opt convergence criteria need to be fixed for AUGLAG. (It can't use stopval because of the penalty term, and without that there is no termination criterion.)