Fixes add and get commands.
Receipt was storing salts in binary so retrieval was wrong, now it base64 encodes/decodes transparently. Masks are not proper salts which IV the AES encryption decryption and are fixed 16 bytes.
Padding has changed too, chunks are no longer padded and checking of the chunk sizes has been disabled. Passwords are padded now and can be of any length.
DISTRESS server will now respond on each accepted packet so there is no hopeful waiting between add_block blasts.