- remove setMaxLevel
- use new Logger
- use filesystem for config path

same as in open source

now the same names as in open source

The boundary conditions were in the wrong order. This caused effects at the edges of the fluid domain, which caused the the simulation to crash.

set defaults for gridPath and (out)Path
related #27 and #22

Moved Simulation::init() to Constructor, Simulation:free() to destructor and exchanged some members of Simulation with unique_ptr instances.

Added SG model to StressBC, added Timer-class which wraps existing timer in Simulation, added round-off correction in TurbulentViscosityCumulantK17CompChim_Device (testing ongoing)

gridFactory was removed in ad5efd33 and then readded in 3bc3af50