Make generator scripts more deterministic.
merge gen_docu.py with gen_ir.py
fix nodes.html for input/output changes
arm: fix arm_get_frame_entity() asking non-arm nodes for arm attributes
amd64: fix some PIC code problems

There are still similar problems left.
amd64: slightly simplify create_sign_tv()
amd64: simplify+fix rewrite_float_unsigned_conv