Measuring operation size.

When originating a contract or making a transfer, tezos node forms operation which is submitted over network. Size of this operation depends on content of originated contract or transfer parameter resp., and tezos has a hard limit on operation size thus it has to be accounted.

Functions declared in this module allow assessing size of origination or transfer operation with up to constant precision because it yet accounts only for Michelson primitives participating in the operation. Other stuff which affects op size include parameters which user passes to origination or transfer themselves, for instance, amount of mutez carried to the contract. ATM we don't have necessary primitives in Haskell to be able to handle those parameters here, probably waiting for [TM-89]. Currently, we can assess overall transfer size only approximatelly, like in smallTransferOpSize.