all integrate function now use the adaption to provide checking functionality
the implementations in detail::integrate_* are not aware of the checkers at
all.
integrate_times now uses checked_stepper and checked_observer to implement
the checking facility. Not that this means the integrate implementations in
detail::integrate_times have no knowledge on the checkers at all.
Following the discussion in #173, the integrate_const function now
provide a mechanisms to check for TOO_MUCH_WORK situations where too
many steps are performed without any progress (i.e. observer calls).
Naturally, this only makes sense for controlled steppers or dense
output steppers.
Also, integrate_adaptive functions do not require such functionality as
there observer calls happen at every time step.
Hence, only integrate_n_steps and integrate_times will be adapted shortly
