plaintext block must be a multiple of segment_size

[cjhust]

why CFB mode need text is a multiple of segment_size?

golang and C don't need this limit

[ricmoo]

Do those libraries automatically pad the content?

There is currently a discrepancy between what This library uses for segment size, which is this library only works on multiples of 8 bits, but the segment size should be specifyable in bits instead of bytes. This is something I will address soon.

[Varbin]

@ricmoo PyCrypto(dome) does also not require this. Oh wait it does (it just has a default value of 8...)