Update btcctl getwork for latest btcjson changes.
Update btcctl getwork for latest btcjson changes.

CryptocurrencyCabal/htcd,aakselrod/btcd,btcsuitereleases/btcd,cjepson/btcd,pkothbauer/btcd,ppcsuite/ppcd-old,danoctavian/btcd,mathiasrw/btcd,Dirbaio/btcd,cjepson/btcd,ppcsuite/ppcd,wallclockbuilder/btcd,aakselrod/btcd,jrick/dcrd,Roasbeef/btcd,soapboxsys/ombfullnode,1d4Nf6/btcd,davecgh/btcd,btcsuite/btcd,ltcsuite/ltcd,BitGo/prova,wallclockbuilder/btcd,ppcsuite/ppcd,dajohi/btcd,hectorj/btcd,sysbot/btcd,Evil-Coin/Evil,Stash-Crypto/btcd,glv2/ppcd,qchain/btcd,DanielKrawisz/btcd,jcmincke/dcrd,dajohi/btcd,Stash-Crypto/btcd,btcsuitereleases/btcd,Cleawing/btcd,tb00/btcd,soapboxsys/ombfullnode,adiabat/btcd,dan-da/btcd,danoctavian/btcd,decred/dcrd,jrick/btcd,stevenroose/btcd,adiabat/btcd,glv2/ppcd,jongillham/btcd,toddfries/btcd,jimmysong/btcd,pkothbauer/btcd,sysbot/btcd,mathiasrw/btcd,jcmincke/dcrd,tb00/btcd,jcmincke/dcrd,dan-da/btcd,jimmysong/btcd,jrick/dcrd,BitGo/prova,davecgh/btcd,Roasbeef/btcd,ppcsuite/ppcd-old,jongillham/btcd,Evil-Coin/Evil,stevenroose/btcd,btcsuite/btcd,FactomProject/btcd,Dirbaio/btcd,DanielKrawisz/btcd,1d4Nf6/btcd,cqswxj2013/btcd,CryptocurrencyCabal/htcd,toddfries/btcd,runeaune/btcd,ltcsuite/ltcd,runeaune/btcd,dajohi/btcd,jrick/btcd,Cleawing/btcd,decred/dcrd,qchain/btcd,jrick/btcd,hectorj/btcd,cqswxj2013/btcd,FactomProject/btcd,Dirbaio/btcd