- `std::apply` is part of C++17 and the compiler wants to use it because
of ADL. Thus it is now necessary to escape it as `::apply`.
- remove some `using namespace std` remaining in the sources.
- fix simple warnings.
- Used in eoAlgoRestart, useful if one wants to reset some things before a
restart.
- Add operators to reset a pop (EO) and a distrib (EDO) and a wrapper to
combine several reset operators.
