RPC coverage

[whphhg]

Remote procedure calls (RPC) currently used by the GUI.

• [x] BackupWallet
• [x] ChainBlender (info, start, stop)
• [x] CheckWallet
• [x] CreateRawTransaction
• [ ] DatabaseEnv
• [ ] DatabaseFind
• [ ] DatabaseStore
• [ ] DecodeRawTransaction
• [ ] DecodeScript
• [x] DumpPrivKey
• [x] DumpWallet
• [x] DumpWalletSeed
• [x] EncryptWallet
• [ ] GetAccount
• [ ] GetAccountAddress
• [x] GetAddressesByAccount
• [ ] GetBalance
• [ ] GetBestBlockHash
• [x] GetBlock
• [ ] GetBlockCount
• [x] GetBlockHash
• [ ] GetBlockTemplate
• [x] GetDifficulty
• [x] GetIncentiveInfo
• [x] GetInfo
• [x] GetMiningInfo
• [ ] GetNetworkHashPS
• [x] GetNetworkInfo
• [x] GetNewAddress
• [x] GetPeerInfo
• [x] GetRawMempool
• [ ] GetRawTransaction
• [x] GetTransaction
• [x] GetUnconfirmedBalance
• [x] ImportPrivKey
• [x] ListAccounts
• [ ] ListReceivedByAccount
• [ ] ListReceivedByAddress
• [x] ListSinceBlock
• [ ] ListTransactions
• [x] ListUnspent
• [x] RepairWallet
• [x] SendFrom
• [x] SendMany
• [ ] SendRawTransaction
• [x] SendToAddress
• [ ] SetTxFee
• [x] SignMessage
• [ ] SubmitBlock
• [x] ValidateAddress
• [x] VerifyMessage
• [ ] WalletDenominate
• [x] WalletLock
• [x] WalletPassphrase
• [x] WalletPassphraseChange
• [x] ZtLock