unit in core have still some int overflow pb caused by undue tests
Merge pull request #862 from jtlap/next_prev_core

unit in core have still some int overflow pb caused by undue tests
unused typedef for core/swar units
Merge pull request #863 from jtlap/core_swar_unused

unused typedef for core/swar units
adding some ignore_unused to silence some warnings in bench mode
missing ignore_unused in scalar construct
unused typedef for core/base/ieee units
Merge pull request #864 from jtlap/core_base_ieee__unused

unused typedef for core/base/ieee units
unused typedef for core/reduction units
Merge pull request #865 from jtlap/core_reduction_unused

unused typedef for core/reduction units
unused typedef for core/base arithmetic units
Merge pull request #866 from jtlap/core_base_arith_unused

unused typedef for core/base arithmetic units
Made add_settings variadics and exhaustive
Remove dependency of dsl/forward on settings/forward
Cleanup of settings.hpp

- settings(...) is now variadic
- Removed forward file for settings
WIP match_option rewrite