added armory_derive_chaincode function (wallets 1.35 support)
added armory_derive_chaincode function (wallets 1.35 support)

sipak/brainwallet,A-Zak/brainwallet.github.io,jhoenicke/brainwallet.github.io,Colored-Coins/brainwallet.github.io,jamescarter-le/brainwallet.github.io,brainwallet/brainwallet.github.io,btcspry/brainwallet.github.io,jamescarter-le/brainwallet.github.io,A-Zak/brainwallet.github.io,2XL/brainwallet.github.io,rexquigg/brainwallet,nvoron23/brainwallet.github.io,Colored-Coins/brainwallet.github.io,sipak/brainwallet,brainwalletX/brainwalletX.github.io,nvoron23/brainwallet.github.io,jhoenicke/brainwallet.github.io,Taiiwo/bitcoin-signature-tool,Taiiwo/bitcoin-signature-tool,2XL/brainwallet.github.io,btcspry/brainwallet.github.io,brainwalletX/brainwalletX.github.io