* move triats to internal namespace
* drop obsolete methods in favor of compiler errors
* group free methods

* move traits to internal namespace
* drop unused local typedefs

* drop unused local typedefs
* update static checks

* add safe integer conversion
* move traits to internal namespace
* update static checks

* move traits to internal namespace
* do not guard dune includes
* update evaluation handling
* add safe integer conversion
* mark ctors explicit

* do not guard dune includes
* add over_integrate
* add safe integer conversion
* update evaluation handling
* move traits to internal namespace

* move traits to internal namespace
* add over_integrate
* add safe integer conversion
* update evaluation handling