Chances 10.1.2004

• Throw away the crtbegin-Things, the l4-things are good
• Steal l4/pkg/cxx/lib/start/src/cxx_* from Alexander Warg The Threadabstraction is beautifull, but there may be other Thread-Warapper and we let the user the choise

• crt0_destruction don't exist, static destructores are not called