script extracting sizeof() from C headers

... baby jesus is *not* pleased.
Common -> Nc_common
stub generator
.gitignore generated files
disable 8-bit RSA test for now
hook up _oasis for ctypes
prepare bindings for ctypes
swap hashes
switch rijndael
move 3DES
cleanup
god knows where `bash` might be hiding
hash: less alloc
style
record some timings
commented-out packed setup
harmonize file naming
hook in cstubs generator
separate bindings generator into src_gen/
properly hook up header-inspection