Reorganisation of schematic libraries :
1. Connectors to new library
2. IGBT and GTO to default
3. Valve standardized
IGBT und GTO nun in default.oreglib. power.oreglib obsolet !
Change of default.oreglib and removal of power.oreglib. Parts of
power.oreglib are still in default.oreglib
SConscript changed due to removal of power.oreglib