prepare for global PG optimizatoin

setting up pg-files for new framework
multi-axis support
changed back to RoW & WoR as form factor limits
inline functions for gear design

materials need to be loaded properly
materials fixed
materials fixed
PG model (almost) fully adapted

to be fixed: no feasible solution found
Planetary gear complete

implemented as single gear stages
needs to be tested against different scenarios
Merge branch 'PG_globalOptimization'