ocb_generic doesn't return a value. mark it as such
Merge branch 'master' of https://github.com/vincenthz/hs-cipher-aes
add AESIV
constify some block operations
add generalizednewtypederiving to define Byteable instance
add some IV length tests to prevent issue where the IV is not proper
introduce a new genCounter that also returns the new IV.
Change order to put the iv at the snd place
bump version to 0.2.9