Propagate static exception extension to clambda
Start propagating extended static exceptions to Lambda: staticraise

It desactivate simplify_exit
Finish a rought addaptation of Lambda
Substitute static exceptions in closure
Remove incorrect simplification in case of recursive catch
Assertions in selectgen
Simplif.simplif_tail_calls
Allow a few more cases to be converted to staticraise
Fixes in authorised cases
Update printlambda
Update simplif_exit, remove the negative static exception kludge.