Corrected fee estimation for general transactions
Corrected fee estimation for general transactions

The byte size of inputs and outputs was changed to reflect the current
serialization sizes of Decred transactions. The size of the transaction
is also now more generously estimated in case a large amount of inputs
are required.

jrick/btcwallet,jrick/btcwallet,jrick/dcrwallet,decred/dcrwallet,decred/dcrwallet,jrick/dcrwallet